Trust

Maintenance Window:

Start time is August 6, 10:00 am PDT (August 6, 17:00 UTC)

End time is August 6, 3:00 pm PDT (August 6, 22:00 UTC)

Third-Party Vendor Incident (Snowflake) - app.avalor.io

Mon, 03 Aug 2026 00:00:00 GMT

Zscaler is aware of service impact stemming from an incident affecting our third-party vendor, Snowflake. Customers may experience disruptions with analytics and reporting capabilities that depend on Snowflake.

Snowflake is actively engaged in remediation efforts. For the most current updates, please refer to Snowflake’s status page

Administration UI Issue - zscaler.net, zdxcloud.net

Mon, 03 Aug 2026 10:46:29 GMT

Zscaler has detected an issue with the administration UI on its zscaler.net Cloud. Customers may encounter issues with Admin UI login, Zscaler Client Connector portal, and SCIM auto-provisioning.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Issue occurred due to a recent service update.

Latest Update - Tue, 04 Aug 2026 05:06:35 UTC

We are pleased to confirm that the service has been fully restored. All performance and stability indicators have remained consistently healthy following the hotfix deployment. The environment has been validated by our teams and we are confident in the stability of the service. This incident is now marked as Resolved. We appreciate your patience throughout this incident.

Update - Mon, 03 Aug 2026 11:10:09 UTC

Zscaler is prioritizing the issue and is actively working to isolate the problem and identify the root cause. We appreciate your patience and understanding during this investigation. Additional updates will be provided as more information becomes available.

Update - Mon, 03 Aug 2026 11:59:42 UTC

Zscaler continues to commit to resolving the issue and is actively engaged in efforts to isolate the cause and determine the root of the problem. Zscaler appreciates your ongoing patience and understanding during this process, and further updates will be provided as new information becomes available.

Update - Mon, 03 Aug 2026 13:06:57 UTC

The Zscaler team has identified the root cause as a recent service update. Zscaler teams are actively prioritizing the incident, exploring various mitigation options, and working to restore services.

Update - Mon, 03 Aug 2026 14:36:19 UTC

Zscaler has identified the root cause of this issue, which is related to a recent service update. We are actively working on a fix and are in the process of preparing and validating the build for deployment. We will provide a further update once the fix is ready for production deployment. We appreciate your continued patience.

Update - Mon, 03 Aug 2026 18:20:02 UTC

We continue to progress the fix deployment and the validation of the updated build for release. Our teams are actively preparing and validating the build, and we will provide another update once it is ready for production deployment.

Update - Mon, 03 Aug 2026 20:55:06 UTC

We are continuing to make progress on the fix deployment through a phased and controlled rollout. As part of this process, we are updating supporting components first before transitioning services to the updated environment. We will share another update as this work progresses.

Update - Tue, 04 Aug 2026 00:39:08 UTC

We continue to make progress with the controlled rollout of the hotfix. Additional service components have now been updated and returned to normal operation, with stability indicators remaining healthy. The team is preparing for the next planned transition step, and we will provide another update as this work progresses.

Update - Tue, 04 Aug 2026 01:48:32 UTC

The controlled rollout of the hotfix has been completed. Zscaler has validated stability, with all indicators remaining healthy. Services have been restored and we are now moving this incident to Monitoring as we continue to observe system health. Zscaler will provide a further update once the monitoring period confirms sustained stability.

Update - Tue, 04 Aug 2026 05:06:35 UTC

Scheduled Maintenance Extended - zscloud.net

Sun, 02 Aug 2026 06:00:24 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sun, 02 Aug 2026 07:51:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Additions to Zscaler Hub IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Sat, 01 Aug 2026 20:10:58 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on July 31, 2026, we would like to notify you of the changes to the Zscaler Hub IP Addresses as listed below. These will be effective anytime on or after September 29, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

CIDR	Notes
137.31.146.0/23	New addition to Required Hub IP addresses
137.31.148.0/23	New addition to Required Hub IP addresses
137.31.150.0/23	New addition to Required Hub IP addresses
137.31.152.0/23	New addition to Required Hub IP addresses
137.31.154.0/23	New addition to Required Hub IP addresses
167.103.116.0/23	New addition to Required Hub IP addresses

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Urgent Maintenance - zscaler.net

Sat, 01 Aug 2026 19:22:12 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the zscaler.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Mon, 03 Aug 2026 02:53:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 01 Aug 2026 23:17:11 UTC

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscaler.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Mon, 03 Aug 2026 02:53:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalerone.net

Sat, 01 Aug 2026 17:17:19 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerone.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 01 Aug 2026 18:14:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance : Zero Trust Browser / Browser Access - private.zscaler.com, zpatwo.net, zpabeta.net

Sat, 01 Aug 2026 08:59:19 GMT

Zscaler is performing an urgent maintenance for ZPA client-less service. Existing clientless sessions may get briefly disconnected during this maintenance activity.

Update - Sat, 01 Aug 2026 09:22:19 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Applications inaccessibility issue within Zero Trust Browser - private.zscaler.com, zpatwo.net, zpabeta.net

Sat, 01 Aug 2026 07:34:59 GMT

Zscaler is investigating an issue with its private.zscaler.com, zpaatwo.net, and zpa beta Clouds.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The root cause of this incident was an expired certificate on the Universal User Portal (my-apps.p.zscalerportal.net), which prevented ZPA applications from loading within the Zero Trust Browser.

Latest Update - Sat, 01 Aug 2026 09:27:32 UTC

Zscaler has completed all necessary remediation steps and the valid certificate is now fully in effect and this issue is now resolved.

Update - Sat, 01 Aug 2026 07:59:28 UTC

Zscaler has identified an issue where customers using ZPA applications within the Zero Trust Browser may not be able to access their applications across ZPA One, ZPA Two, and beta clouds. Zscaler has identified the root cause and a fix is currently in progress. We will provide a further update once the fix is fully confirmed.

Update - Sat, 01 Aug 2026 08:38:17 UTC

Zscaler has identified that the applied fix for the ZPA application access issue within the Zero Trust Browser across ZPA One, ZPA Two, and beta clouds is still propagating across the system. Zscaler is actively working to expedite full resolution and will provide a further update once the fix is fully confirmed.

Update - Sat, 01 Aug 2026 09:27:32 UTC

Zscaler has completed all necessary remediation steps and the valid certificate is now fully in effect and this issue is now resolved.

Scheduled Maintenance Extended - zscaler.net

Sat, 01 Aug 2026 06:11:16 GMT

Update - Sat, 01 Aug 2026 08:06:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Paris II Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 31 Jul 2026 21:33:50 GMT

Zscaler will be enabling IPv6 at our Paris II (PAR2) Data Center. During the maintenance window the services through PAR2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 5, 10:00 am PDT (August 5, 17:00 UTC)

End time is August 5, 3:00 pm PDT (August 5, 22:00 UTC)

Marseille I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 31 Jul 2026 21:23:20 GMT

Zscaler will be enabling IPv6 at our Marseille I (MRS1) Data Center. During the maintenance window the services through MRS1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 4, 10:00 am PDT (August 4, 19:00 UTC)

End time is August 4, 4:00 pm PDT (August 5, 01:00 UTC)

Update - Tue, 04 Aug 2026 23:00:55 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Administration UI and User Authentication Issues - zscalertwo.net

Fri, 31 Jul 2026 19:14:47 GMT

Zscaler has detected an issue with the administration UI and user authentication on its zscalertwo.net Cloud. Customers may encounter issues with Admin UI login, New user authentication, User Policies, Zscaler Client Connector portal, and SCIM auto-provisioning.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The incident was caused by an internal platform issue that temporarily affected availability for certain services.

Latest Update - Fri, 31 Jul 2026 19:55:04 UTC

Update - Fri, 31 Jul 2026 19:26:15 UTC

Zscaler has applied mitigation steps to resolve the issue, and all services should now be restored. The team continues to closely monitor the situation and assess the effectiveness of these measures.

Update - Fri, 31 Jul 2026 19:55:04 UTC

China Premium Access Plus Shanghai Datacenter (Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 31 Jul 2026 18:23:13 GMT

Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus Services within these data centres may experience intermittent disconnections.

Start Time: 2026/8/21 16:00 (UTC)
End Time: 2026/8/21 20:00 (UTC)

(Datacenter Local Time 2026-08-22 00:00 - 2026-08-22 04:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Service providers are performing upgrades to the network device to enhance service quality and performance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Reminder Notification for Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Thu, 30 Jul 2026 17:02:32 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on June 15, 2026, we would like to remind you of the upcoming data center expansions at the locations listed below. These would be effective anytime on or after August 14, 2026.

Region	Location	CIDR	Notes
Americas	Chicago	137.31.114.0/23	Expansion of existing data center
Americas	Chicago II	137.31.116.0/23	Expansion of existing data center

Please update your firewall policy rules and any upstream access control lists to allow the new IP address ranges to avoid any service disruption. We recommend that you add the IP address ranges listed in the “Zscaler Aggregate IP Address Ranges’’ section of the CENR page to your access lists, firewalls, and application allowlists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Tel Aviv II (TLV2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Thu, 30 Jul 2026 14:35:34 GMT

Zscaler's partner will be performing hardware maintenance in the Tel Aviv II (TLV2) Datacenter.

Maintenance window,
Start: 2026-08-02 21:00 IDT
End: 2026-08-02 23:59 IDT
(i.e. 2026-08-02 18:00 - 20:59 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and our partner expects no service impact.

Update - Sun, 02 Aug 2026 20:27:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Login and UI Access Issue - app.avalor.io, app.eu.avalor.io, app.aps.avalor.io

Thu, 30 Jul 2026 12:44:08 GMT

Zscaler has detected an issue with its app.avalor.io, app.eu.avalor.io, app.aps.avalor.io Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Issue occurred due to a recent service update.

Update - Thu, 30 Jul 2026 12:28:21 UTC

Zscaler has successfully implemented the required measures to address the incident. The issue has been fully resolved, and all systems are operating normally. Continuous monitoring is in place to ensure sustained stability.

Datacenter Expansion Kolkata I (CCU1) - private.zscaler.com

Wed, 29 Jul 2026 19:48:52 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Kolkata I (CCU1).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

https://config.zscaler.com/private.zscaler.com/zpa

Update - Tue, 04 Aug 2026 18:43:36 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Mumbai VI (BOM6) - zpatwo.net

Wed, 29 Jul 2026 19:44:47 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Mumbai VI (BOM6).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

Update - Tue, 04 Aug 2026 18:45:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Milan III (MIL3) Datacenter Network Maintenance - zscaler.net

Wed, 29 Jul 2026 02:11:04 GMT

Zscaler will be performing hardware maintenance in the Milan III (MIL3) Datacenter.

Maintenance window,
Start: 2026-08-04 03:00 CEST
End: 2026-08-04 06:00 CEST
(i.e. 2026-08-04 01:00 - 2026-08-04 04:00 UTC)

Update - Tue, 04 Aug 2026 01:53:02 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Lagos II Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 28 Jul 2026 18:35:17 GMT

Zscaler has detected an issue with its Lagos II datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to Lagos III datacenter. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Issue was observed in Zscaler partner infrastructure.

Latest Update - Thu, 30 Jul 2026 06:38:53 UTC

Following previous actions taken by Zscaler's carrier partner, this issue is now resolved. Our systems are now fully operational, and we will continue to monitor the situation to ensure sustained stability.

Update - Tue, 28 Jul 2026 18:54:04 UTC

An issue with a third-party network provider has been identified, and Zscaler teams are actively working to address and mitigate the problem.

Update - Tue, 28 Jul 2026 21:50:36 UTC

Following the actions previously taken by Zscaler partner, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Update - Wed, 29 Jul 2026 12:08:37 UTC

Zscaler is investigating a resurfaced issue affecting Lagos II data center and is working to restore full functionality as quickly as possible. If you’re currently experiencing any traffic impacting issues please fail over to Lagos III datacenter. Further updates will be provided as they become available.

Update - Wed, 29 Jul 2026 13:35:54 UTC

Zscaler has engaged its data center partner to investigate the root cause. Positive improvements have been observed within the affected network path, and Zscaler is awaiting final confirmation from the partner. The situation continues to be actively monitored to ensure sustained stability and to address any recurrence promptly.

Update - Wed, 29 Jul 2026 21:00:43 UTC

Zscaler continue to coordinate with its data center partner to investigate the root cause. Improvements have been observed on the affected network path, and we are awaiting final confirmation from the partner on full restoration. We are actively monitor the situation. Until restoration is confirmed, customers are advised to fail over traffic to the Lagos III data center.

Update - Thu, 30 Jul 2026 06:38:53 UTC

Opt Out of Microsoft Azure Network Adapter (MANA) for Zscaler ZPA Private Infrastructure Deployed in Microsoft Azure - private.zscaler.com, zpatwo.net, zpabeta.net

Tue, 28 Jul 2026 00:00:00 GMT

Microsoft is currently deploying the Microsoft Azure Network Adapter (MANA), a next-generation network interface included within Azure Boost, across existing Azure virtual machine (VM) size families. This deployment will replace the Mellanox ConnectX-based Accelerated Networking hardware currently utilized by ZPA App Connector, Private Service Edge, Network Connector, and Private Cloud Controller. Effective August 1, 2026, Azure may automatically transition MANA-eligible VMs to MANA-capable hardware during routine lifecycle events, unless an explicit opt-out is configured.

Zscaler formally recommends that all customers implement Microsoft's MANA opt-out configuration (via the LegacyVMNVA tag) across all Azure resource groups, virtual machines (VMs), and VM Scale Sets hosting ZPA App Connectors, Private Service Edges, Network Connectors, and Private Cloud Controllers prior to August 1, 2026.

Pending Zscaler's official announcement regarding Microsoft Azure Network Adapter (MANA) driver support for these components, it is imperative that all ZPA private infrastructure instances continue to utilize Mellanox-based Accelerated Networking. This configuration remains the established, validated methodology for these deployments. Zscaler is currently engaged in the active development of comprehensive MANA driver support.

Why ZPA Private Infrastructure Is In Scope

Accelerated Networking is not enabled by default on ZPA App Connector, Private Service Edge, Network Connector, and Private Cloud Controller deployments in Azure. If you have explicitly enabled Accelerated Networking, you should opt out.
VM instance size check: If the VM instance sizes currently deployed fall within Microsoft's MANA-eligible classification, they are considered part of the MANA deployment and should also be opted out in accordance with Microsoft's guidance.

Potential Impact If No Action Is Taken

Currently Active Instances (Deployed prior to August 1, 2026):

These instances are currently deployed on non-MANA hardware.
Subsequent to August 1, 2026, any lifecycle event (such as stop/start, redeploy, or reapply) may result in the VM being allocated to MANA-enabled hardware.
In the event that the VM is placed on MANA-enabled hardware, Zscaler applications will fail to initialize on that instance.

Currently Active Virtual Machine Scale Sets (VMSS):

Instances within a VMSS are currently deployed on non-MANA hardware.
Following August 1, 2026, any lifecycle event at the VMSS level (Scale-Out, Scale-In) or at the individual instance level (stop/start, redeploy, or reapply) may cause the VM to be provisioned on MANA-enabled hardware.
If any VM within a VMSS is allocated to MANA-enabled hardware, Zscaler applications will fail to initialize on that specific VM.

Newly Deployed Instances (With or Without Scale Sets):

If a new deployment is allocated to MANA-enabled hardware, Zscaler applications will fail to initialize on those instances.

Required Action before Aug 1, 2026: Apply the Microsoft Opt-Out

Apply Microsoft's LegacyVMNVA opt-out configuration by adhering to the official guidance: MANA support for Network Virtual Appliances (NVAs).

At scale (recommended) Assign Microsoft's built-in LegacyVMNVA Azure Policy, incorporating compliance remediation, across all subscriptions or resource groups that contain these components. This policy applies the tag to both individual VMs and Virtual Machine Scale Sets. Microsoft advises assigning the built-in policy as-is to ensure that subsequent updates are automatically propagated.
Individual VMs Apply the LegacyVMNVA tag, requiring no associated value, to each individual App Connector, Private Service Edge, Network Connector, and Private Cloud Controller VM.
Provided that the VM is currently executing on non-MANA-enabled hardware, the presence of this tag guarantees that the instance will persist on non-MANA-enabled infrastructure during any subsequent lifecycle events.
VM Scale Sets Apply the LegacyVMNVA tag to the scale set model. For existing instances, update the tag separately using:

az vm update --resource-group <rg-name> --name <instance-name> --set tags.LegacyVMNVA='"true"'

Alternatively, a rolling instance replacement subsequent to tagging the model achieves an identical outcome. Verify that instances generated by scale-out events after tagging inherit the tag.

Infrastructure as Code If you deploy these components via Zscaler Terraform modules or your own templates, add the LegacyVMNVA tag to your VM and VMSS resource definitions so that all future deployments and scale-out instances carry the tag from creation. VMs created after August 1, 2026 without the tag may be placed directly on MANA-capable hardware.

Verification

Confirm the LegacyVMNVA tag is visible on each App Connector, Private Service Edge, Network Connector, and Private Cloud Controller VM and VMSS in the Azure portal.
Azure Advisor raises recommendations against affected NVAs; use it to identify untagged instances.
If you suspect an instance has already been placed on MANA hardware (indicated by a MANA Virtual Function visible to the guest), contact Zscaler Support for verification, apply the tag, and perform a stop/deallocate/start to return the instance to Mellanox-based hardware.

Recovery Steps if Impacted:

These recovery operations are exclusively applicable to a VM subsequent to its allocation to MANA-capable hardware. If the opt-out configuration has been properly implemented, these VMs will be completely precluded from being placed on MANA-enabled hardware.

Apply the opt-out tag:

az vm update -g <resource group name> -n <vm instance name> --set tags.LegacyVMNVA=""

Deallocate:

az vm deallocate -g <resource group name> -n <vm instance name>

Start:

az vm start -g <resource group name> -n <vm instance name>

How to check if a ZPA VM is placed on MANA-enabled hardware

On these Linux-based instances, a MANA Virtual Function is visible to the guest under Microsoft vendor ID 0x1414. Run:

lspci -nn | grep -i '1414:00ba'

A returned device (Microsoft Corporation, class Ethernet) indicates MANA placement. You can also confirm the interface driver:

lspci -nnk | grep -iA3 '1414:00ba'

A driver of mana (rather than mlx5_core) confirms the instance is on MANA hardware.

Key Dates (Azure Public Cloud)

Date	Event
May 26, 2026	Azure began placing Intel v5 and Cobalt 100 v6 family VMs on MANA-capable hardware in select regions. If you run these components on v5/v6 sizes, apply the opt-out immediately.
July 31, 2026	Deadline to apply the opt-out (or be MANA-ready) for Intel v1–v4 families.
August 1, 2026	All listed VM families become eligible for MANA placement. VMs created or tagged after this date may be placed on MANA-capable hardware.
May 31, 2027	The LegacyVMNVA opt-out sunsets. From June 1, 2027, all MANA-eligible VMs may be placed on MANA-capable hardware regardless of tagging.

Caveats and Additional Notes

On-Demand Capacity Reservations (ODCR): Applying LegacyVMNVA to VMs under an ODCR reduces the available capacity pool for placement, and ODCR SLA guarantees do not apply to those VMs while tagged.
The opt-out mechanism is proprietary to and maintained exclusively by Microsoft. For technical errors encountered during enforcement of the Azure Policy or configuration of the tag, contact Microsoft Azure support. For inquiries pertaining to ZPA component operational behavior or performance, contact Zscaler Support.
The opt-out mechanism is temporary and does not constitute a permanent exemption. Utilize the period prior to May 31, 2027, to plan migration to MANA-validated software (referenced below).

Long-Term Resolution

Zscaler is currently collaborating with Microsoft to validate the MANA driver stack for ZPA App Connector, Private Service Edge, Network Connector, and Private Cloud Controller. Announcements regarding MANA support will be disseminated via the respective component release notes. Upon availability of a MANA-validated release, customers should plan to upgrade to that version or later prior to the May 31, 2027 opt-out sunset, after which all MANA-eligible VMs will be transitioned to MANA-capable hardware.

References

Microsoft: MANA support for Network Virtual Appliances (NVAs) - opt-out guidance
Microsoft: Microsoft Azure Network Adapter (MANA) overview
Microsoft: Announcing MANA support for existing VM SKUs

Scheduled Maintenance | Cellular Network Events in Experience Center - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Fri, 24 Jul 2026 21:20:07 GMT

Zscaler will perform maintenance on Cellular, which is part of Zscaler Admin Console. Maintenance will occur on July 25, 2026, from 4:00 AM to 7:00 AM UTC.

During this maintenance window, the service is expected to remain available. However, admins might experience delays in viewing the latest SIM information, recent SIM-related network events, and anomaly policy events associated with SIMs.

This maintenance is intended to improve platform reliability and performance.

After the maintenance is complete, the service is expected to operate normally, and no customer action is required. If you experience any issues after the maintenance window, contact Zscaler Support for assistance.

Update - Sat, 25 Jul 2026 08:01:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai IV Data Center Decommissioning - zscaler.net

Thu, 23 Jul 2026 20:10:18 GMT

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

Please note that the Mumbai IV (BOM4) data center will be shut down any time on or after October 21, 2026. The customers that are still connecting to BOM4 via GRE or IPSEC tunnel(s) must migrate their traffic to the new Mumbai VII (BOM7) data center. All such customers will be contacted separately with migration instructions.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Zscaler Mobile Admin (ZMA) Availability Issue - zscalertwo.net

Wed, 22 Jul 2026 16:22:49 GMT

Zscaler has detected an issue with the Zscaler Client Connector Portal and Zscaler Client Connector (ZCC) on its zscalertwo.net Cloud. Some users may see a “ Zscaler Client Connector was unable to enroll at this time” message when trying to sign in to Zscaler Client Connector (ZCC). Users who are already signed in should continue to access services normally.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A recent build change contributed to elevated latency under peak user load.

Latest Update - Fri, 24 Jul 2026 17:34:56 UTC

Update - Wed, 22 Jul 2026 16:54:29 UTC

We are investigating an issue impacting device registration and Zscaler Client Connector Portal, we have implemented corrective actions and restarted affected components, and are currently validating recovery and monitoring service stability.

Update - Wed, 22 Jul 2026 17:13:37 UTC

We have deployed a fix and are no longer observing errors. ZCC enrollment and MA Portal access should now be fully restored

Update - Wed, 22 Jul 2026 20:11:16 UTC

The Zscaler teams have successfully mitigated the issue, supported by positive feedback from customers. To validate the effectiveness of the resolution, a thorough health check was conducted. Zscaler continues to monitor the situation closely to ensure ongoing stability.

Update - Fri, 24 Jul 2026 00:37:54 UTC

Zscaler has confirmed the service is operating normally, and we will continue to closely monitor the environment to ensure ongoing stability.

Update - Fri, 24 Jul 2026 17:34:56 UTC

Mexico City II Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 21 Jul 2026 21:51:44 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Mexico City II (MEX2) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on August 3, 2026

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

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Update 7/22: Maintenance postponed and rescheduled to a new date

Update - Tue, 04 Aug 2026 03:36:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Administration UI and Authentication Issue - zscalertwo.net

Tue, 21 Jul 2026 19:40:31 GMT

Zscaler has detected an issue with its zscalertwo.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A platform issue briefly disrupted ZIA control plane services, resulting in the impact observed during this incident window. This is a preliminary observation. A full Root Cause Analysis (RCA) is currently underway, and additional details will be shared upon completion.

Latest Update - Tue, 21 Jul 2026 21:54:52 UTC

Update - Tue, 21 Jul 2026 19:56:50 UTC

Between 19:16 and 19:30 UTC, some customers may have experienced intermittent disruptions accessing the Zscaler Admin Portal, Experience Center, and related administrative services, including Device Registration and New User Authentication. There was no impact to traffic forwarding — end-user internet access and security policy enforcement continued to operate normally throughout this period. The incident has been mitigated. Zscaler are investigating the root cause, and monitoring remains in place to ensure continued stability. We will provide a further update as our investigation progresses.

Update - Tue, 21 Jul 2026 21:54:52 UTC

Red Hat Enterprise Linux (RHEL) 9.x Boot Issue Impacting ZPA Components During Operating System (OS) Upgrades - private.zscaler.com, zpatwo.net, zpabeta.net

Tue, 21 Jul 2026 00:00:00 GMT

As a continuation of the previous Advisory related to RHEL 9.x Boot Issue Impacting ZPA Components During OS Upgrades, we would like to provide the following information regarding the latest progress and next steps.

Zscaler is aware of a boot-related issue affecting Red Hat Enterprise Linux (RHEL) 9.x that can impact ZPA infrastructure components, and to share the steps we are taking to protect your environment. A recent Red Hat update (RHBA-2026:18665, released with RHEL 9.x on May 19, 2026) increased the size of a core system boot file. On the affected components, this larger file can exceed the space available in the system's boot partition, which may prevent the component from starting up properly. It is important to take the required action immediately to prevent disruption.
_______________________________________________________________________________________________________________________________________________________________

Affected Services

ZPA Infrastructure Components: App Connector, Private Service Edge, Network Connector, and Private Cloud Controller.
_______________________________________________________________________________________________________________________________________________________________

Who Is Impacted

This issue affects ZPA infrastructure components running on a RHEL-based OS image (Zscaler Managed Image) in Microsoft Azure, Amazon Web Services (AWS), and Google Cloud Platform (GCP). Within these cloud environments, a system may be affected only when Zscaler Automatic OS Upgrades are enabled, or when OS updates have been applied manually.

The following deployment types are not affected:

On-premises virtualization platforms — VMware, Nutanix, and the ZPA Appliance (ZT8010)
Containerized deployments — Docker, Kubernetes, and OpenShift — which do not rely on the impacted boot partition

Verifying Impact

You can confirm whether your ZPA infrastructure is impacted using two checks.

Step 1 — Check the size of the /boot partition

Run the following command:

df -h

Locate the row mounted on /boot and review the value in the Size column. A /boot partition of approximately 500 MB indicates your deployment may be impacted.

Filesystem                          Size  Used Avail Use% Mounted on
/dev/mapper/rootvg-rootlv            10G  2.5G  7.5G  25% /
/dev/sda1                           536M  373M  164M  70% /boot

In this example, /boot is 536 MB and already 70% full.

Step 2 — Check the size of the initramfs images

Next, inspect the contents of /boot:

ls -lh /boot

Locate the rows for initramfs and review their sizes. If any initramfs image is larger than 100 MB, your deployment is impacted.

Example output (impacted host):

$ ls -lh /boot
total 277M
-rw-------. 1 root root 230M May 31 18:36 initramfs-5.14.0-687.12.1.el9_8.x86_64.img
-rwxr-xr-x. 1 root root  15M Jun 10 11:40 vmlinuz-5.14.0-687.15.1.el9_8.x86_64

In this example, the initramfs image is 230 MB — well above the 100 MB threshold — confirming the host is impacted.

Why this matters

Because the /boot partition is small and already heavily used, it does not have enough free space to hold an additional initramfs image of this size. When the Red Hat kernel update is installed, it can consume the remaining capacity on /boot. The update then fails to complete, and the system is unable to boot successfully afterward.
_______________________________________________________________________________________________________________________________________________________________

What Zscaler Is Doing

Zscaler validated Red Hat's official fix for this issue and made available an updated 4 GB boot partition image for ZPA infrastructure components on Microsoft Azure, Amazon Web Services (AWS), and Google Cloud Platform (GCP).

_______________________________________________________________________________________________________________________________________________________________

Actions Zscaler Has Taken to Protect Your ZPA Components

As a precautionary measure, Zscaler has temporarily disabled automatic OS updates for ZPA components, including App Connector, Private Service Edge, Network Connector, and Private Cloud Controller.

Note:- Automatic OS updates will be re-enabled only for instances running the latest Zscaler Managed Image, which provisions a 4 GB /boot partition with sufficient space to accommodate current and future initramfs images. Once an instance is running the latest image, no further action is required—the larger partition is a one-time, permanent fix.

Please note that the core ZPA software and automatic Manager updates will continue without interruption and remain unaffected by this change

_______________________________________________________________________________________________________________________________________________________________

Required Action

Zscaler's recommended: Implement new Zscaler Managed Image

Replace the affected components by deploying new instances using the latest Zscaler Managed Image, which provisions a 4 GB /boot partition designed to accommodate both current and future initramfs image sizes, ensuring compatibility with ongoing operating system updates.

Temporary Alternative: In-Place Partition Space Optimization

If replacing the affected components is not immediately feasible, you can use the following workaround on the affected components before applying any operating system updates. This mitigates the boot failure by reducing the size of the generated initramfs image.

Step 1 — Reduce the initramfs size

Exclude the DRM module, which significantly reduces the size of the generated initramfs image:

echo 'omit_dracutmodules+=" drm "' > /etc/dracut.conf.d/no-drm.conf

Step 2 — Regenerate the initramfs images

Apply the change by regenerating the initramfs for all installed kernels:

dracut -f -v --regenerate-all

Step 3 — Reboot the instance for the change to take effect:

sudo reboot

Step 4 — Proceed with the update

Once the steps above are complete, the instance can be safely updated:

sudo yum update -y

We recommend performing either action during a planned maintenance window and validating one system before applying the change broadly across your environment.

_______________________________________________________________________________________________________________________________________________________________

Automated Option: Scripted Workaround

Alternatively, Zscaler provides a script that performs Steps 1 and 2 above automatically, with built-in pre-flight checks, idempotent configuration handling, and full logging to /var/log/disable-drm-dracut.log for audit and troubleshooting purposes.

Download the script here: Zscaler Community

To apply the workaround using the script:

1. Copy the downloaded script to the affected instance (for example, to the /tmp directory):

scp disable-drm-dracut.sh <user>@<instance-ip>:/tmp/

If inbound file transfer (SCP/SFTP) is not permitted to the instance, you can instead create the file directly over an SSH session. Run the following command, paste the full contents of the downloaded script, and then type SCRIPT_EOF on a new line to finish:

cat > /tmp/disable-drm-dracut.sh << 'SCRIPT_EOF'
# paste the script contents here
SCRIPT_EOF

2. Execute the script with elevated privileges:

sudo bash /tmp/disable-drm-dracut.sh

Note: Invoke the script via sudo bash as shown above. Executing it directly (e.g., sudo /tmp/disable-drm-dracut.sh) may fail with a Permission denied error on hardened systems where /tmp is mounted with the noexec option.

3. Verify that the script completed successfully by checking its exit code:

echo $?

An exit code of 0 indicates success. Any non-zero exit code indicates a failure; refer to /var/log/disable-drm-dracut.log for details.

4. Reboot the instance for the change to take effect:

sudo reboot

5. Once the instance is back online and healthy, proceed with the operating system update:

sudo yum update -y

As with the manual steps, we recommend performing this action during a planned maintenance window and validating one system before applying the change broadly across your environment.

Cloud-to-Cloud Incident Forwarding and Email DLP Issue - zscloud.net

Tue, 21 Jul 2026 17:14:49 GMT

Zscaler is investigating an issue affecting cloud-to-cloud (C2C) incident forwarding and email DLP for some tenants.

Customers may experience disruption to cloud-to-cloud incident forwarding across inline, endpoint, and other channels, where DLP incidents may not be captured in incident records during the impact window. Email DLP quarantine actions are also impacted, and quarantine release actions may be delayed or unavailable. Remediation actions may not execute as expected, and dashboards and logs may show delayed or missing updates. Some minor degradation in SaaS Security data-at-rest scanning may also be observed; however, service continuity measures are in place to minimize impact.

Inline web browsing traffic and real-time ZIA policy enforcement are not impacted.

Zscaler teams are actively investigating and working to restore service. We will provide further updates as more information becomes available.. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A hardware failure on a service node caused disruption to the affected service.

Latest Update - Tue, 21 Jul 2026 22:42:10 UTC

Update - Tue, 21 Jul 2026 17:21:38 UTC

Zscaler has identified the root cause of the issue and is actively working on resolution. We will provide further updates as more information becomes available.

Update - Tue, 21 Jul 2026 18:25:57 UTC

Zscaler has implemented the necessary actions to restore the service and has confirmed that the service is recovering as expected. We are actively monitoring the environment to ensure continued stability.

Update - Tue, 21 Jul 2026 22:42:10 UTC

Zscaler Client Connector (ZCC) and Zscaler Client Connector Portal Authentication Issues - zscalertwo.net

Mon, 20 Jul 2026 14:38:39 GMT

Zscaler has detected an Authentication issue with the Zscaler Client Connector Portal and Zscaler Client Connector (ZCC) on its zscalertwo.net Cloud. Some users may see a “Zscaler Client Connector was unable to enroll at this time” message when trying to sign in to Zscaler Client Connector (ZCC). Users who are already signed in should continue to access services normally.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Intermittent Client Connector registration/sign-in and Mobile Admin Portal access issues occurred, investigation is ongoing to confirm the underlying cause.

Latest Update - Mon, 20 Jul 2026 19:06:03 UTC

Update - Mon, 20 Jul 2026 14:53:46 UTC

We have identified the root cause of the issue and working on resolution.

Update - Mon, 20 Jul 2026 15:12:42 UTC

We are investigating an issue impacting Zscaler Client Connector sign-in/registration and access to the Mobile Admin Portal for a subset of users on ZS2. Mitigation actions have been applied and we are now monitoring the service. We will provide another update as more information becomes available.

Update - Mon, 20 Jul 2026 15:43:08 UTC

We are continuing to investigate an issue impacting Zscaler Client Connector sign-in/registration and access to the Mobile Admin Portal for a subset of users on ZS2. Initial mitigation actions did not fully restore service. We identified a contributing configuration change that reduced service capacity for the Mobile Admin Portal on ZS2, which led to intermittent access issues for some users. Our teams are reverting the change and actively applying additional remediation steps to recover affected services. We are monitoring recovery and will provide further updates as more information becomes available.

Update - Mon, 20 Jul 2026 16:35:29 UTC

We have reverted the contributing configuration change and implemented additional adjustments to improve service capacity on ZS2. We are currently validating these changes and monitoring recovery for Zscaler Client Connector sign-in/registration and Mobile Admin Portal access. We will provide another update as validation completes or if service status changes.

Update - Mon, 20 Jul 2026 16:54:01 UTC

We are receiving positive feedback from multiple customers indicating service recovery. Our teams continue to closely monitor services and will provide further updates as more information becomes available.

Update - Mon, 20 Jul 2026 19:06:03 UTC

Scheduled Maintenance | Experience Center – India Region Expansion - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zscalerrisk.net, zslogin.net

Mon, 20 Jul 2026 12:18:20 GMT

Zscaler will perform scheduled infrastructure maintenance for Experience Center on Tuesday, July 21, 2026, from 1:00 AM to 3:00 AM UTC to support the addition of a new geographic region in India.

The maintenance is designed to be completed without service interruption, and Experience Center is expected to remain available throughout the maintenance window. Although no disruption is anticipated, administrators may experience brief, intermittent interruptions in the unlikely event of unforeseen circumstances.

No customer action is required. Following completion of the maintenance, the service is expected to continue operating normally. If you experience any issues after the maintenance window, please contact Zscaler Support.

Update - Tue, 21 Jul 2026 05:26:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Data at Rest Scanning Issue - zscloud.net

Sun, 19 Jul 2026 07:04:13 GMT

Zscaler has detected an issue with its zscloud.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue occurred due to a recent service update.

Update - Sun, 19 Jul 2026 07:30:04 UTC

Zscaler has made the necessary changes and implemented the required measures to mitigate the issue. The service has been fully restored and is operating as expected.

Required Action: Opt Out of Microsoft Azure Network Adapter (MANA) for Zscaler Cloud Connectors Deployed in Microsoft Azure - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Sat, 18 Jul 2026 00:00:00 GMT

Microsoft is currently deploying the Microsoft Azure Network Adapter (MANA), a next-generation network interface included within Azure Boost, across existing Azure virtual machine (VM) size families. This deployment will replace the Mellanox ConnectX-based Accelerated Networking hardware currently utilized by Cloud Connector. Effective August 1, 2026, Azure may automatically transition MANA-eligible VMs to MANA-capable hardware during routine lifecycle events, unless an explicit opt-out is configured.

Zscaler formally recommends that all customers implement Microsoft's MANA opt-out configuration (via the LegacyVMNVA tag) across all Azure resource groups, virtual machines (VMs), and VM Scale Sets hosting Cloud Connectors prior to August 1, 2026.

Pending Zscaler's official announcement regarding Microsoft Azure Network Adapter (MANA) driver support for Cloud Connector, it is imperative that all Cloud Connector instances continue to utilize Mellanox-based Accelerated Networking. This configuration remains the established, validated methodology for Cloud Connector deployments. Zscaler is currently engaged in the active development of comprehensive MANA driver support.

Why Cloud Connector Is In Scope

Accelerated Networking is enabled by default across all Cloud Connector deployments within the Azure Marketplace. Microsoft's opt-out directives specifically target this category of workloads, namely Network Virtual Appliances (NVAs) utilizing Accelerated Networking.
The supported instance sizes for Cloud Connector are included in Microsoft's MANA-eligible classification. The standard Cloud Connector dimensions recommended by Zscaler, specifically Standard_D2s_v3 and Standard_DS2_v2, Standard_DS3_v2, Standard_D2ds_v4, and Standard_D2ds_v5 fall within the specific versions encompassed by the MANA deployment.
Network Virtual Appliance (NVA) workloads experience a distinct impact due to their immediate reliance on the underlying network hardware and drivers, in accordance with the guidance provided by Microsoft.

Potential Impact If No Action Is Taken

Currently Active Cloud Connectors (Deployed prior to August 1, 2026):
1. These instances are currently deployed on non-MANA hardware.
2. Subsequent to August 1, 2026, any lifecycle event affecting the Cloud Connector (such as stop/start, redeploy, or reapply) may result in the virtual machine (VM) being allocated to MANA-enabled hardware.
3. In the event that the VM is placed on MANA-enabled hardware, Zscaler applications will fail to initialize on that instance.
Currently Active Virtual Machine Scale Sets (VMSS):
1. Cloud Connector instances within a VMSS are currently deployed on non-MANA hardware.
2. Following August 1, 2026, any lifecycle event at the VMSS level (Scale-Out, Scale-In) or at the individual Cloud Connector level (stop/start, redeploy, or reapply) may cause the VM to be provisioned on MANA-enabled hardware.
3. If any VM within a VMSS is allocated to MANA-enabled hardware, Zscaler applications will fail to initialize on that specific VM.
Newly Deployed Cloud Connectors (With or Without Scale Sets):
1. If a new deployment of Cloud Connector VMs is allocated to MANA-enabled hardware, Zscaler applications will fail to initialize on those instances.

Required Action before Aug 1 2026: Apply the Microsoft Opt-Out

It is recommended to apply Microsoft's LegacyVMNVA opt-out configuration by adhering to the official guidance: MANA support for Network Virtual Appliances (NVAs).

1. At scale (recommended)
It is recommended to assign Microsoft's built-in LegacyVMNVA Azure Policy, incorporating compliance remediation, across all subscriptions or resource groups that contain Cloud Connectors. This policy applies the tag to both individual virtual machines and Virtual Machine Scale Sets. Microsoft advises assigning the built-in policy as-is to ensure that subsequent updates are automatically propagated..

2. Individual VMs
Apply the LegacyVMNVA tag, requiring no associated value, to each individual Cloud Connector Virtual Machine (VM).

Provided that the Cloud Connector VM is currently executing on non-MANA-enabled hardware, the presence of this tag guarantees that the instance will persist on non-MANA-enabled infrastructure during any subsequent lifecycle events.

3. VM Scale Sets
Apply the LegacyVMNVA tag to the scale set model. For existing instances, update the tag separately utilizing the following command:
az vm update --resource-group <rg-name> --name <instance-name> --set tags.LegacyVMNVA='"true"'

Alternatively, a rolling instance replacement subsequent to tagging the model achieves an identical outcome. It is necessary to verify that instances generated by scale-out events after tagging inherit the tag.

4. Infrastructure as Code
If you deploy Cloud Connectors via the Zscaler Terraform modules (zscaler/cloud-connector-modules/azurerm) or your own templates, add the LegacyVMNVA tag to your VM and VMSS resource definitions so that all future deployments and scale-out instances carry the tag from creation. VMs created after August 1, 2026 without the tag may be placed directly on MANA-capable hardware.

Verification

Confirm the LegacyVMNVA tag is visible on each Cloud Connector VM and VMSS in the Azure portal.
Azure Advisor raises recommendations against affected NVAs; use it to identify untagged Cloud Connectors.
If you suspect an instance has already been placed on MANA hardware (indicated by a MANA Virtual Function visible to the guest), contact Zscaler Support for verification, apply the tag, and perform a stop/deallocate/start to return the instance to Mellanox-based hardware.

Recovery Steps if Impacted:
In the event that a Cloud Connector virtual machine (VM) is allocated to MANA-capable hardware, please execute the following remediation procedures to restore the instance. Note that these recovery operations are exclusively applicable to a VM subsequent to its allocation to MANA-capable hardware. If the configurations specified in the “Required Action: Apply the Microsoft Opt-Out” section have been properly implemented, Cloud Connector VMs will be completely precluded from getting placed on MANA-enabled hardware entirely.

Apply the opt out tag

az vm update -g <resource group name> -n <vm instance name> --set tags.LegacyVMNVA=""

Deallocate

az vm deallocate -g <resource group name> -n <vm instance name>

Start

az vm start -g <resource group name> -n <vm instance name>

How to check if Cloud Connector VM is placed in MANA enabled hardware

In the event that a Cloud Connector virtual machine (VM) is allocated to MANA-enabled hardware, an unattached PCI device appears within the PCI configuration when the following command is executed: pciconf -lv | grep -iEA 3 'class=0x020000.*vendor=0x1414.*device=0x00ba'

none1@pci1:0:0:0: class=0x020000 rev=0x00 hdr=0x00 vendor=0x1414 device=0x00ba subvendor=0x1414 subdevice=0x00b9

vendor = 'Microsoft Corporation'

class = network

subclass = ethernet

Key Dates (Azure Public Cloud)

Date	Event
May 26, 2026	Azure began placing Intel v5 and Cobalt 100 v6 family VMs on MANA-capable hardware in select regions. If you run Cloud Connectors on v5/v6 sizes, apply the opt-out immediately.
July 31, 2026	Deadline to apply the opt-out (or be MANA-ready) for Intel v1-v4 families.
August 1, 2026	All listed VM families become eligible for MANA placement. VMs created or tagged after this date may be placed on MANA-capable hardware.
May 31, 2027	The LegacyVMNVA opt-out sunsets. From June 1, 2027, all MANA-eligible VMs may be placed on MANA-capable hardware regardless of tagging.

Caveats and Additional Notes

On-Demand Capacity Reservations (ODCR): Applying LegacyVMNVA to VMs under an ODCR reduces the available capacity pool for placement, and ODCR SLA guarantees do not apply to those VMs while tagged.
The opt-out mechanism is proprietary to and maintained exclusively by Microsoft. For technical errors encountered during the enforcement of the Azure Policy or the configuration of the tag, please contact Microsoft Azure support. For inquiries pertaining to Cloud Connector operational behavior or performance characteristics, please contact Zscaler Support.
The opt-out mechanism is temporary and does not constitute a permanent exemption. It is recommended to utilize the period prior to May 31, 2027, to plan the migration to MANA-validated Cloud Connector software (referenced below)..

Long-Term Resolution
Zscaler is currently collaborating with Microsoft to validate the MANA driver stack for Cloud Connector. Announcements regarding MANA support will be disseminated via the Cloud Connector release notes. Upon the availability of a MANA-validated Cloud Connector release, customers should plan to upgrade to that specific version or subsequent versions prior to the May 31, 2027 opt-out sunset, after which all MANA-eligible VMs will be transitioned to MANA-capable hardware.

References

Zscaler: Cloud & Branch Connector documentation
Zscaler: Deploying Cloud Connector with Microsoft Azure
Zscaler: Cloud Connector Azure Terraform Templates
Microsoft: MANA support for Network Virtual Appliances (NVAs) - opt-out guidance
Microsoft: Microsoft Azure Network Adapter (MANA) overview
Microsoft: Announcing MANA support for existing VM SKUs

Urgent maintenance on ZS1 VZEN nodes - zscalerone.net

Sat, 18 Jul 2026 18:57:36 GMT

Zscaler will be performing an urgent maintenance on the VZEN nodes in zscalerone.net cloud. The maintenance will happen across VZEN nodes during the window, beginning at 02:00 PM Pacific Time on Saturday, July 18, 2026 and continuing for up to 6 hours. VZEN's services may be restarted as part of this change and service for your end users might be disrupted during the window. All logs will be collected and available after maintenance is complete.

Update - Sun, 19 Jul 2026 18:22:27 UTC

This activity was completed. Please contact Zscaler Support if you have additional questions.

New York IV (NYC4) Datacenter Network Maintenance - zscalertwo.net, zscloud.net

Fri, 17 Jul 2026 23:54:43 GMT

Zscaler will be performing hardware maintenance in the New York IV (NYC4) Datacenter.

Maintenance window,
Start: 2026-07-21 18:00 EDT
End: 2026-07-21 21:00 EDT
(i.e. 2026-07-21 22:00 - 2026-07-22 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Tue, 21 Jul 2026 23:37:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Munich I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Fri, 17 Jul 2026 23:09:42 GMT

Zscaler will be enabling IPv6 at our Munich I (MUC1) Data Center. During the maintenance window the services through MUC1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 3, 10:00 am PDT (August 3, 17:00 UTC)

End time is August 3, 5:00 pm PDT (August 4, 00:00 UTC)

Update 7/21: Maintenance postponed
Update 7/31: Maintenance rescheduled
Update 8/3: Maintenance extended

Update - Tue, 04 Aug 2026 18:34:46 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Rare Windows System Crash During Upgrade or Uninstall of Zscaler Client Connector 4.8 Builds Prior to 4.8.0.190 - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Mon, 20 Jul 2026 00:00:00 GMT

Zscaler has identified an issue in the ZCC driver included with Windows ZCC 4.8 builds prior to 4.8.0.190. The issue may be triggered when the impacted driver is replaced or removed during a ZCC upgrade or uninstall.

The condition is timing-dependent and may occur only under rare circumstances based on system activity at the time of the upgrade or uninstall. Because of this, it is not possible to predict in advance which individual endpoints may encounter the issue.

Affected versions:

- Zscaler Client Connector for Windows 4.8 builds earlier than 4.8.0.190

Not affected:

- Zscaler Client Connector 4.6
- Zscaler Client Connector 4.7
- Zscaler Client Connector 4.8.0.190 and later
- Zscaler Client Connector 4.9

As an additional preventative measure, Zscaler will remove the affected Windows ZCC 4.8 versions from the Mobile Admin portal to help prevent customers from selecting or deploying impacted builds through standard upgrade workflows.

Zscaler has released specialized one-time updater packages to provide a safe upgrade path for affected devices. These packages are intended to be deployed through customers’ endpoint management or MDM tools rather than through standard Mobile Admin-based ZCC upgrade workflows.

For affected systems, the updater stages a remediated driver. The corrected driver becomes active only after the device is rebooted. After reboot, the device can safely complete the ZCC upgrade process. Some updater packages also include an embedded ZCC installer to automatically upgrade the endpoint after reboot.

Customers should review the linked Knowledge Base article for package selection, deployment steps, validation guidance, and recovery procedures for devices that may have already encountered the issue.

Scheduled Maintenance Extended - zscalerone.net

Fri, 17 Jul 2026 11:01:13 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerone.net cloud by 5 hour. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 17 Jul 2026 16:13:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Administration UI Issue - zscaler.net

Fri, 17 Jul 2026 10:12:56 GMT

Zscaler has identified an issue affecting the Administration UI and Zscaler Client Connector Admin Portal on the zscaler.net cloud. Customers may experience issues accessing the Administration UI and the Zscaler Client Connector Admin Portal.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Zscaler identified and mitigated an issue related to the control plane.

Update - Fri, 17 Jul 2026 11:52:18 UTC

Following the actions taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

New Delhi Datacenter issue - zscalerthree.net

Fri, 17 Jul 2026 06:22:12 GMT

Zscaler is currently investigating reports of an issue with its New Delhi I datacenter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and updates will be posted there as they become available.

Root Cause: The issue occurred due to high resource utilization

Latest Update - Thu, 30 Jul 2026 09:43:21 UTC

Zscaler has completed its investigation into the issue affecting the New Delhi I data center. The environment has been fully stabilized, and our monitoring confirms that all services are performing as expected with no further customer impact observed.

Update - Fri, 17 Jul 2026 06:40:27 UTC

Update - Fri, 17 Jul 2026 08:03:45 UTC

Based on our continuous monitoring and health checks, all services are currently performing as expected. Zscaler teams remain actively engaged in evaluating additional optimization measures and will continue to monitor the environment to ensure sustained stability. Further updates will be provided as the situation progresses.

Update - Thu, 30 Jul 2026 09:43:21 UTC

Reminder Notification for Upcoming New DCs and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Thu, 16 Jul 2026 20:41:08 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on June 1, 2026, we would like to remind you of the upcoming New DCs and expansions at the locations listed below. These would be available anytime on or after July 31, 2026.

Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Buenos Aires II	137.31.102.0/23	New RS* data center
Americas	Buenos Aires II	137.31.104.0/23	New RS* data center
Americas	Buenos Aires II	137.31.106.0/23	New RS* data center
Americas	Buenos Aires II	137.31.108.0/23	New RS* data center
Americas	Buenos Aires II	137.31.110.0/23	New RS* data center
Americas	Buenos Aires II	2605:4300:e800::/40	New RS* data center
APAC	Canberra I	175.107.180.0/23	Expansion of existing data center
APAC	Canberra I	175.107.182.0/23	Expansion of existing data center
EMEA	Dusseldorf I	137.31.94.0/23	Expansion of existing data center

We recommend that you add the IP address ranges listed in the ‘Zscaler Aggregate IP Address Ranges’ section of the CENR page to your access lists, firewalls, and application allowlists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Reminder Notification for Additions to HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Thu, 16 Jul 2026 20:35:34 GMT

Dear Customer,

In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on June 1, 2026, we would like to remind you of the upcoming changes to HUB IP address ranges as listed below. The services through the new IP address range will be available anytime on or after July 31, 2026.

CIDR	Notes
175.107.184.0/23	New addition to Required Hub IP addresses

Please update your firewall policy rules and any upstream access control lists to allow the new IP address range to avoid any service disruption.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Urgent Maintenance - zscalertwo.net

Thu, 16 Jul 2026 17:56:19 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalertwo.net cloud. This maintenance is scheduled for Saturday at 06:00 AM Pacific Time on July 18, 2026 (Saturday, July 18, 2026 01:00 PM UTC), and can take up to 4 hours to complete.

During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updates through SCIM, LDAP, and SAML. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

Latest Update - Sat, 18 Jul 2026 17:50:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 18 Jul 2026 16:40:38 UTC

This maintenance is extended by 2 hours.Please contact Zscaler Support if you have additional questions.

Update - Sat, 18 Jul 2026 17:50:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler Help Portal - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Thu, 16 Jul 2026 00:00:00 GMT

Zscaler has identified an issue affecting the Zscaler Help Portal. The root cause has been traced to an ongoing Amazon CloudFront incident. We will provide a further update as soon as more information becomes available or once the issue has been resolved.

Following the resolution of the Amazon CloudFront incident, the Zscaler Help Portal is now functioning as expected.

Washington DC (WAS1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net

Thu, 16 Jul 2026 04:16:55 GMT

Zscaler will be performing hardware maintenance in Washington DC (WAS1) Datacenter.

Scheduled Maintenance window,
Start: 2026-07-17 02:00 UTC
End: 2026-07-17 06:00 UTC
(Local Time 2026-07-16 22:00 - 2026-07-17 02:00)

Update: The maintenance window has been extended by an additional 2 hours.

Update - Fri, 17 Jul 2026 05:12:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago II Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Thu, 16 Jul 2026 00:36:44 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chicago II (CHI2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is July 16, 6:00 pm PDT (July 17, 1:00 UTC)

End time is July 16, 11:00 pm PDT (July 17, 6:00 UTC)

Update - Fri, 17 Jul 2026 05:50:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Intermittent Login Issues with Experience Center - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zscalerrisk.net, zslogin.net

Wed, 15 Jul 2026 22:07:16 GMT

Zscaler experienced intermittent login issues affecting the Experience Center. The issue has been mitigated, and we are continuing to monitor the service to ensure stability. During the incident window, some customers may have experienced intermittent difficulties logging in.

Root Cause: A deployment-related configuration change caused intermittent login issues affecting the Experience Center.

Update - Wed, 15 Jul 2026 22:22:42 UTC

Intermittent loss of connectivity on macOS Tahoe and Sequoia with route-based traffic interception - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Wed, 15 Jul 2026 00:00:00 GMT

What is the issue?:

The native macOS firewall on Tahoe and Sequoia can significantly delay processing and intermittently drop Zscaler Client Connector traffic after device boot-up and wake/sleep events, resulting in Zscaler Client Connector not being able to receive traffic from apps and consequently forwards traffic to the Zero Trust Exchange in route-based traffic interception mode. During this event, users receive a “Endpoint FW/AV Error” error in Zscaler Client Connector and lose connectivity to Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA) and Zscaler Digital Experience (ZDX) until the macOS firewall resumes processing of Zscaler Client Connector traffic again.

Who is impacted?

This issue can impact customers running Zscaler Client Connector in route-based mode on macOS Tahoe and Sequoia devices with the native macOS firewall enabled.

Who isn’t impacted?

The following customers aren’t impacted:

Zscaler Client Connector on macOS Tahoe and Sequoia in route-based traffic interception mode with third-party firewalls and native macOS firewall disabled
Zscaler Client Connector on macOS Tahoe and Sequoia in Transparent Proxy-based Interception mode (TRP)
Zscaler Client Connector on macOS Tahoe and Sequoia in route-based mode with native macOS firewall disabled

Why does this impact Zscaler Client Connector only?

Zscaler Client Connector converts packets into flows when intercepting traffic from local apps in route-based traffic interception mode. This interception process causes the traffic to traverse the macOS inbound firewall rules triggering this issue. Packet-based tunnel implementations in third-party VPN clients do not traverse the inbound firewall in the same way are not impacted by this issue.

What are my next steps?

Customer running macOS Tahoe 26.2 and later have the following options:

Deploy an enterprise firewall solution instead and disable the native macOS firewall.
Migrate from route-based mode to Transparent Proxy-based Interception mode (TRP).
Deploy the Zscaler Client Connector firewall feature and disable the macOS firewall.

Customers running macOS Sequoia or Tahoe releases older than 26.2 have the following options:

Deploy an enterprise firewall solution instead and disable the native macOS firewall.
Deploy the Zscaler Client Connector firewall feature and disable the macOS firewall.

Where can I find more information about the above options?

Zscaler Client Connector firewall option:

The Zscaler Client Connector firewall supports the ability to allow/block inbound and outbound traffic based on apps, ip addresses, protocols and ports and advanced security.
Supports the ability to enforce different firewall rules based on Trusted Location type.
Supported on MDM/UEM managed macOS devices only.
Does not support the ability to automatically allow signed software to accept incoming connections.
Does not require reinstallation of Zscaler Client Connector
Directions to deploy the Zscaler Client Connector firewall feature can be found here.

Transparent Proxy-based Traffic Interception (TRP) option:

Does not require inbound firewall rule in macOS firewall
No reliance on host routing table
Zscaler Tunnel (Z-Tunnel) 2.0 compatibility with third-party VPN clients
Does not support interception of ICMP traffic and ZPA Machine Tunnels at this time.
Does not require reinstallation of Zscaler Client Connector
Directions to deploy Transparent Proxy-based Traffic Interception (TRP) can be found here.

You can find a list of Known Issues for either option in the Zscaler Support Portal under Resources.

What if I have more questions?

If you have additional questions, contact Zscaler Support via the Support link in any Admin Portal; a case can be created with Product = Zscaler Client Connector and Type = Question.

China Premium Access Plus Shanghai Datacenter (Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 15 Jul 2026 20:42:26 GMT

Start Time: 2026-08-09 13:00:00 UTC
End Time: 2026-08-09 15:00:00 UTC
(Datacenter Local Time 2026-08-09 21:00 - 2026-08-09 23:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

China Premium Access Plus Beijing Datacenter (Beijing V) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 15 Jul 2026 20:40:01 GMT

Beijing V DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus Services within these data centres may experience intermittent disconnections.

Start Time: 2026-08-05 13:00:00 UTC
End Time: 2026-08-05 15:00:00 UTC
(Datacenter Local Time 2026-08-05 21:00 - 2026-08-05 23:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Wed, 05 Aug 2026 14:46:14 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New Delhi I (DEL1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net

Wed, 15 Jul 2026 20:01:40 GMT

Zscaler will be performing hardware maintenance in the New Delhi I (DEL1) Datacenter.

Maintenance window,
Start: 2026-07-17 22:00:00 IST
End: 2026-07-18 02:00:00 IST
(i.e. 2026-07-17 16:30 - 20:30 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.

Update - Fri, 17 Jul 2026 20:31:59 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reporting and Logging Issue - zscloud.net, zscalerthree.net

Wed, 15 Jul 2026 11:21:58 GMT

Zscaler is currently investigating reports of issues with Reporting and Logging on its zscloud.net, zscalerthree.net Cloud. Your organization's policies are being enforced. All user logs are being collected and will be available at the resolution of this incident.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Administration UI Issue - zscalerthree.net

Wed, 15 Jul 2026 04:52:05 GMT

Zscaler has detected an issue with the administration UI on its zscalerthree.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Issue occurred due to recent service update.

Latest Update - Wed, 15 Jul 2026 09:39:58 UTC

Update - Wed, 15 Jul 2026 05:18:40 UTC

Update - Wed, 15 Jul 2026 05:42:48 UTC

Zscaler has identified the root cause and implemented mitigation measures. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Update - Wed, 15 Jul 2026 09:39:58 UTC

ZPA Diagnostic logs Issue - private.zscaler.com

Tue, 14 Jul 2026 08:20:58 GMT

Zscaler has detected an issue with its private.zscaler.com Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Issue occurred due to recent service update.

Update - Tue, 14 Jul 2026 08:25:06 UTC

Zscaler has identified the root cause and implemented mitigation measures. The incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.

Lagos III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 13 Jul 2026 18:23:39 GMT

Zscaler will be enabling IPv6 at our Lagos III (LOS3) Data Center. During the maintenance window the services through LOS3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 16, 10:00 am PDT (July 16, 17:00 UTC)

End time is July 16, 3:00 pm PDT (July 16, 22:00 UTC)

Update - Fri, 17 Jul 2026 18:38:06 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester II Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net, zscalerthree.net

Mon, 13 Jul 2026 18:14:40 GMT

Zscaler will be enabling IPv6 at our Manchester II (MAN2) Data Center. During the maintenance window the services through MAN2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 15, 2:00 pm PDT (July 15, 21:00 UTC)

End time is July 15, 8:00 pm PDT (July 16, 3:00 UTC)

Update - Thu, 16 Jul 2026 00:39:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Degraded AgentZ Performance and Conversation History - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 13 Jul 2026 16:04:58 GMT

We are currently investigating a potential issue were customers are experiencing 503 Service Temporarily Unavailable errors when submitting support cases via AgentZ.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue was caused by an internal configuration and infrastructure condition that intermittently affected service performance.

Latest Update - Tue, 14 Jul 2026 16:46:59 UTC

Update - Mon, 13 Jul 2026 16:35:35 UTC

We have identified the root cause of the issue and working on resolution.

Update - Mon, 13 Jul 2026 18:32:21 UTC

Zscaler has mitigated a recent issue affecting AgentZ and is actively monitoring the service to ensure continued stability. Service has been restored, and logging is operating normally. Zscaler is actively monitoring the service to ensure continued stability and accuracy.

Guidance: Customers are advised to review case details before submission to ensure all information is accurate and complete.

Zscaler will provide additional updates if needed.

Update - Mon, 13 Jul 2026 23:31:59 UTC

Service has remained stable following mitigation, and Zscaler continues to monitor to ensure ongoing stability and performance.

Update - Tue, 14 Jul 2026 16:46:59 UTC

Urgent Maintenance : ZIdentity Service Upgrade - zslogin.net

Sun, 12 Jul 2026 01:39:51 GMT

Zscaler will perform an urgent maintenance for the ZIdentity (ZID) Authentication service between 05:00 UTC and 07:00 UTC on Sunday, Jul 12, 2026. This maintenance includes feature enhancements and bug fixes designed to improve platform reliability and performance.
During the maintenance window, users may experience intermittent login or portal access issues for approximately 30–45 minutes. Following completion of the maintenance activities, service is expected to operate normally without customer intervention.
If you experience any access issues after the maintenance window has concluded, please contact Zscaler Support for assistance.

Update - Sun, 12 Jul 2026 06:16:37 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZDX Copilot Experiencing Degraded Performance for Entity-Based Questions - zdxcloud.net

Sat, 11 Jul 2026 19:58:43 GMT

Zscaler has detected an issue with its zdxcloud.net Cloud. Customers using ZDX Copilot may experience degraded performance when submitting queries involving users, devices, applications, and other entity-based data. This may result in slower responses, incomplete results, or difficulty retrieving expected insights through Copilot.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Cache capacity exhaustion in ZDX Copilot triggered this issue.

Latest Update - Mon, 13 Jul 2026 17:51:06 UTC

Zscaler has completed all mitigation action to restore full services. We are now considering this incident as resolved.

Update - Sat, 11 Jul 2026 20:03:56 UTC

We have identified the root cause of the issue and working on resolution.

Update - Sat, 11 Jul 2026 21:20:35 UTC

We have identified the underlying backend issue affecting ZDX Copilot and are actively working to restore normal service. To accelerate recovery, we have prioritized restoration efforts for the most impacted customers and begun reloading key data sets across affected environments. We are also working closely with vendor on backend capacity improvements to support full service restoration. We will continue to share updates as progress is made.

Update - Sun, 12 Jul 2026 05:18:53 UTC

Zscaler has completed mitigation steps on our end to address the issue. Full resolution is pending an ongoing investigation with our vendor. We are actively monitoring the situation and will provide updates as the investigation progresses.

Update - Mon, 13 Jul 2026 04:04:45 UTC

Zscaler continues to monitor the ZIA Copilot service following mitigation steps. Copilot functionality has been restored for affected customers, and we are awaiting further updates from the vendor as their investigation continues.

Update - Mon, 13 Jul 2026 17:51:06 UTC

Zscaler has completed all mitigation action to restore full services. We are now considering this incident as resolved.

Website inaccessibility issue over PAC - zscaler.net

Sat, 11 Jul 2026 08:55:29 GMT

Zscaler is investigating an issue with its zscaler.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Preliminary investigation suggests that the root cause is attributed to a recent change.

Update - Sat, 11 Jul 2026 09:48:57 UTC

Zscaler has identified and resolved the issue for affected customers on the Zscaler.net cloud. The issue was caused by a recent change to a Zscaler managed cloud component, which was rolled back to restore normal service.

Product Name Update: ZIdentity is now Authentication Service - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zslogin.net

Fri, 10 Jul 2026 00:00:00 GMT

What's Changing?

Zscaler is renaming ZIdentity to Authentication Service. This is a name change only, with no changes to product functionality.

Why Are We Making This Change?

The name Authentication Service more clearly reflects the product’s purpose as the centralized authentication and identity management service across Zscaler services.

For more information, please refer to the following article: What is Authentication Service

Zscaler Client Connector (ZCC) Device Registration Failures - zscalertwo.net, zscalerthree.net

Fri, 10 Jul 2026 22:01:27 GMT

Zscaler is aware of and investigating an issue affecting a subset of users on the zscalertwo.net and zscalerthree.net clouds who may experience device registration failures in Zscaler Client Connector (ZCC). Affected users may see a “Device Registration Failed” message with error code 3053 and may be unable to complete device registration or access services.

At this time, this issue does not affect all users or all customers. Based on current findings, the impact appears to be limited to users with a high number of group memberships.

Zscaler is actively investigating the issue and working on resolution options. Further updates will be provided as more information becomes available. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A recent platform update introduced a processing limitation affecting device registrations for a subset of users with complex group membership configurations.

Latest Update - Tue, 14 Jul 2026 21:51:41 UTC

Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation to ensure ongoing stability.

Update - Fri, 10 Jul 2026 23:29:35 UTC

Zscaler has identified the underlying cause and is working on both an immediate mitigation and a permanent fix. As a temporary relief measure, Zscaler is implementing a change to reduce the amount of group membership information included during device registration for affected users. A permanent product fix is also in development. Further updates will be shared as more information becomes available.

Update - Mon, 13 Jul 2026 22:13:14 UTC

Zscaler has identified the root cause of the issue. During validation of the initial mitigation, an additional risk was identified, and that change was rolled back to prevent unintended impact. A revised mitigation and permanent fix plan is now being rolled out in phases. Initial deployment has completed successfully, and rollout to the remaining environments is scheduled during the maintenance window. Further updates will be shared as progress continues.

Update - Tue, 14 Jul 2026 05:31:00 UTC

Zscaler has deployed the fix across all environments and is actively monitoring the issue. Further updates will be shared as progress continues.

Update - Tue, 14 Jul 2026 18:26:07 UTC

Following the deployment of the fixes, services have remained stable. Zscaler continues to monitor closely for ongoing stability and customer feedback. Further updates will be shared as needed.

Update - Tue, 14 Jul 2026 21:51:41 UTC

Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation to ensure ongoing stability.

Tel Aviv II Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 10 Jul 2026 17:31:58 GMT

Zscaler will be enabling IPv6 at our Tel Aviv II (TLV2) Data Center. During the maintenance window the services through TLV2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 14, 9:00 am PDT (July 14, 16:00 UTC)

End time is July 14, 5:00 pm PDT (July 15, 00:00 UTC)

Update 7/14: Extending Maintenance

Update - Wed, 15 Jul 2026 01:09:03 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Miami III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 10 Jul 2026 17:10:32 GMT

Zscaler will be enabling IPv6 at our Miami III (MIA3) Data Center. During the maintenance window the services through MIA3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 13, 4:00 pm PDT (July 13, 23:00 UTC)

End time is July 13, 9:00 pm PDT (July 14, 4:00 UTC)

Update - Tue, 14 Jul 2026 04:36:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Frankfurt VI (FRA6) Datacenter Network Maintenance - zscaler.net

Thu, 09 Jul 2026 21:35:10 GMT

Zscaler will be performing hardware maintenance in the Frankfurt VI (FRA6) Datacenter.

Maintenance window,
Start: 2026-07-15 18:00 CEST
End: 2026-07-15 22:00 CEST
(i.e. 2026-07-15 16:00 - 20:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Wed, 15 Jul 2026 19:44:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Copenhagen II (CPH2) Datacenter Network Maintenance - zscloud.net

Thu, 09 Jul 2026 21:03:52 GMT

Zscaler will be performing hardware maintenance in the Copenhagen II (CPH2) Datacenter.

Maintenance window,
Start: 2026-07-13 20:00 CEST
End: 2026-07-14 00:00 CEST
(i.e. 2026-07-13 18:00 - 22:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Wed, 15 Jul 2026 19:44:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Frankfurt IV (FRA4) Critical Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Thu, 09 Jul 2026 20:59:01 GMT

Zscaler will be performing critical hardware maintenance in the Frankfurt IV (FRA4) Datacenter.

Maintenance window,
Start: 2026-07-13 20:00 CEST
End: 2026-07-14 00:00 CEST
(i.e. 2026-07-13 18:00 - 22:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Mon, 13 Jul 2026 21:13:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Bogota I (BOG1) Data Center - Performance Degradation - zscalertwo.net

Thu, 09 Jul 2026 18:37:18 GMT

Zscaler is aware of and currently investigating performance degradation affecting the Bogota I (BOG1) Data Center. Customers may experience increased latency or degraded performance while accessing services through this location. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Zscaler identified elevated resource utilization within the Bogota I (BOG1) Data Center as the cause of the intermittent performance degradation.

Latest Update - Tue, 21 Jul 2026 23:20:37 UTC

Update - Thu, 09 Jul 2026 21:54:56 UTC

Zscaler has identified the underlying issue affecting performance in the Bogota I (BOG1) Data Center and has implemented mitigation measures. If you continue to experience traffic-impacting issues, please fail over to your secondary data center or another alternate data center. Zscaler is also working on longer-term infrastructure enhancements in the region to further improve resiliency. We will continue to monitor the environment for stability and provide updates here as progress is made.

Update - Mon, 13 Jul 2026 21:25:41 UTC

Zscaler has implemented mitigation measures to address the performance degradation affecting the Bogota I (BOG1) Data Center. Performance has improved, and we are continuing to closely monitor the environment while additional remediation activities are completed. Customers may still experience intermittent latency or degraded performance while these efforts continue. If you are experiencing traffic-impacting issues, please fail over to your secondary data center or another alternate data center. We will continue to provide updates here as progress is made.

Update - Tue, 14 Jul 2026 22:28:13 UTC

Zscaler has mitigation measures in place for the performance degradation affecting the Bogota I (BOG1) Data Center. Additional remediation work remains in progress, and customers may continue to experience intermittent latency or degraded performance. If you are experiencing traffic-impacting issues, please fail over to your secondary data center or another alternate data center. We will continue to monitor the environment for stability and provide updates as progress is made.

Update - Sun, 19 Jul 2026 19:04:21 UTC

Zscaler has implemented additional remediation actions for the Bogota I (BOG1) Data Center and continues to monitor the environment to ensure stability.

Update - Tue, 21 Jul 2026 23:20:37 UTC

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Wed, 08 Jul 2026 22:10:20 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Zscaler Management Portal for Partners and ZDX Admin Portal might not be available. This maintenance is scheduled for Saturday at 11:00 AM Pacific Time on July 11, 2026 (Saturday, July 11, 2026 06:00 PM UTC), and can take up to 2 hours to complete. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Changes in exclusion method for Zoom and Teams on iOS - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 08 Jul 2026 00:00:00 GMT

As a part of Zscaler’s continuous product improvement process, we are making a change to how the built-in exclusions for Zoom and Teams work on iOS. Today these exclusions are processed inside Zscaler Client Connector (ZCC) itself, where ZCC will receive the traffic and then bypass it from tunneling.

We have seen vastly improved performance with these applications by excluding this traffic pre-zcc, commonly referred to as VPN Gateway Bypass, and we will be making a change to exclude this traffic at this level by default.

What is changing?

The predefined Zoom and Team’s bypasses will be directly added to the VPN Gateway Bypass logic. There will be no visible change for administrators or any additional steps required.

Who is impacted?

Customers leveraging ZCC on iOS with Zoom and or Teams bypasses configured today, or in future. Administrators will see no change in how these bypasses are configured, and ZCC will exclude this traffic locally on the device in a more optimized way. Users will have no visible impact to their devices, but should expect improved performance with Zoom and Teams applications, specifically for the length of time needed to reconnect after transitioning networks.

When is the update scheduled?

Zscaler will begin implementing this change across all tenants beginning on July 15, 2026.

What are my next steps?

No action is required to benefit from these improvements, however if you would like to have your tenant changed prior to the dates above, or wish for your tenant to not be automatically changed, please contact Zscaler Support.

What if I have more questions?

If you have additional questions, contact Zscaler Support via the Support link in any Admin Portal; a case can be created with Product = Zscaler Client Connector and Type = Question.

Reporting and Logging Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 08 Jul 2026 13:30:26 GMT

Zscaler is currently investigating reports of an issue affecting Reporting and Logging on the zscalerthree.net cloud. Customers may intermittently encounter errors when attempting to download Web Insights logs.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Software defect, a fix has been deployed.

Latest Update - Mon, 20 Jul 2026 07:59:11 UTC

The fix for the "request context is no longer available" error encountered when downloading Web Insights logs has been successfully deployed across all impacted clouds. This incident is now resolved.

Update - Wed, 08 Jul 2026 17:26:51 UTC

Zscaler has implemented corrective actions to remediate the issue and is continuing to monitor the environment to ensure sustained stability.

Update - Wed, 08 Jul 2026 21:07:11 UTC

Update - Thu, 09 Jul 2026 08:15:20 UTC

Zscaler is currently investigating reports of a recurring issue affecting Reporting and Logging on the zscalerthree.net cloud, with additional reports impacting zscloud.net. Customers may intermittently experience errors when attempting to download Web Insights logs.

Update - Sun, 12 Jul 2026 07:20:33 UTC

The fix for the "request context is no longer available" error when downloading Web Insights logs has been successfully deployed to the ZS3 and ZSN clouds and is currently in the soak phase. Deployment to ZS2 and ZSC clouds is scheduled for the coming weekend and further updates will be shared accordingly.

Update - Mon, 20 Jul 2026 07:59:11 UTC

The fix for the "request context is no longer available" error encountered when downloading Web Insights logs has been successfully deployed across all impacted clouds. This incident is now resolved.

Tianjin Datacenter Issue - zscloud.net

Wed, 08 Jul 2026 11:25:52 GMT

Zscaler is currently investigating reports of an issue with its Tianjin datacenter. Customers may encounter intermittent disconnections, periods of slowness, or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and updates will be posted there as they become available.

Root Cause: A hardware failure on a specific node in the Tiajnin Data Center caused this issue.

Latest Update - Thu, 09 Jul 2026 06:58:14 UTC

Zscaler has resolved the issue affecting the Tianjin data center. All nodes have been successfully restored and are actively serving traffic. The data center has been confirmed stable and normal service has been fully resumed.

Update - Wed, 08 Jul 2026 15:38:35 UTC

We have identified the root cause for this issue and we are currently working to mitigate the issue.

Update - Thu, 09 Jul 2026 05:46:01 UTC

Zscaler has made progress in resolving the issue however the reprovisioned nodes in the data center are not yet serving traffic, and we are actively working to bring these nodes online. We will provide further updates as available.

Update - Thu, 09 Jul 2026 06:58:14 UTC

Datacenter Expansion New Delhi (DEL1) - private.zscaler.com

Wed, 08 Jul 2026 06:24:02 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in New Delhi I (DEL1).

These would be available anytime on or after 11th July 2026.

Region	Location	Notes
ASIA	NEW DELHI I	Old DC

The IP addresses for the DC are part of the already published IP address range.

Please update your firewall policy rules along with any upstream ACL(s) to allow the IP address ranges to avoid any service disruption.

For more information, please visit:

Scheduled Maintenance: Experience Center - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Tue, 07 Jul 2026 23:49:03 GMT

Zscaler will perform scheduled maintenance for Experience Center on Jul 18, 2026, 1:00 AM to 3:00 AM UTC. During this maintenance window, the service is expected to remain available; however, administrators may experience brief intermittent disruptions. This maintenance is intended to improve platform reliability and performance.

After the maintenance is complete, service is expected to operate normally, and no customer action is required. If you experience any issues after the maintenance window, please contact Zscaler Support for assistance.

Update - Sat, 18 Jul 2026 07:39:44 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance - VZEN nodes - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 07 Jul 2026 22:04:06 GMT

Zscaler will be performing a maintenance on the VZEN nodes in zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net Cloud. The maintenance will happen across VZEN nodes during the window, beginning at 04:00 PM Pacific Time on Saturday, July 11, 2026 (Sunday, July 12, 2026 12:00 AM UTC) and continuing for up to 6 hours. VZEN's services may be restarted as part of this change and service for your end users might be disrupted during the window. All logs will be collected and available after maintenance is complete.

Update - Sun, 12 Jul 2026 05:21:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Sydney III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Tue, 07 Jul 2026 21:59:25 GMT

Zscaler will be enabling IPv6 at our Sydney III SYD3) Data Center. During the maintenance window the services through SYD3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 10, 7:00 am PDT (July 10, 14:00 UTC)

End time is July 10, 3:00 pm PDT (July 10, 22:00 UTC)

Update 7/10: Extending maintenance

Update - Fri, 10 Jul 2026 22:13:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dubai I Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Tue, 07 Jul 2026 20:31:54 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Dubai I (DXB1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is July 9, 7:00 am PDT (July 9, 14:00 UTC)

End time is July 9, 2:00 pm PDT (July 9, 21:00 UTC)

Update - Thu, 09 Jul 2026 18:00:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Intermittent Failures Affecting Mobile Admin Public API Requests - zscaler.net

Tue, 07 Jul 2026 13:12:41 GMT

Zscaler is investigating an issue causing intermittent failures for the Mobile Admin Public API service on zscaler.net. Some customers may experience failures when accessing the Mobile Admin public API.
We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Configuration issue impacted the Mobile Admin Public API Requests.

Latest Update - Tue, 07 Jul 2026 15:59:15 UTC

Update - Tue, 07 Jul 2026 14:23:19 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Tue, 07 Jul 2026 15:59:15 UTC

Dubai II Data Center Issue - zscloud.net

Tue, 07 Jul 2026 04:45:25 GMT

Zscaler investigated an issue with its Dubai II data center on zscloud.net. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Preliminary root cause is attributed to a change activity.

Update - Tue, 07 Jul 2026 04:31:48 UTC

Zscaler has investigated and resolved an issue at the Dubai II data center. This is a retroactive notification

Vancouver I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscloud.net, zscalerthree.net

Mon, 06 Jul 2026 19:26:25 GMT

Zscaler will be enabling IPv6 at our Vancouver I (YVR1) Data Center. During the maintenance window the services through YVR1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 9, 6:00 pm PDT (July 10, 1:00 UTC)

End time is July 9, 11:00 pm PDT (July 10, 6:00 UTC)

Update - Fri, 10 Jul 2026 05:10:36 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Perth I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 06 Jul 2026 19:17:20 GMT

Zscaler will be enabling IPv6 at our Perth I (PER1) Data Center. During the maintenance window the services through PER1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 8, 9:00 pm PDT (July 8, 16:00 UTC)

End time is July 8, 3:00 pm PDT (July 8, 23:00 UTC)

Update - Wed, 08 Jul 2026 22:22:40 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta II (ATL2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Mon, 06 Jul 2026 16:37:16 GMT

Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.

Maintenance window,
Start: 2026-07-08 03:00 EDT
End: 2026-07-08 07:00 EDT
(i.e. 2026-07-08 07:00 - 11:00 UTC)

Update - Wed, 08 Jul 2026 10:40:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Melbourne II (MEL2) Datacenter Network Maintenance - zscalertwo.net

Mon, 06 Jul 2026 16:05:42 GMT

Zscaler will be performing hardware maintenance in the Melbourne II (MEL2) Datacenter.

Maintenance window,
Start: 2026-07-08 20:00 AEST
End: 2026-07-08 23:00 AEST
(i.e. 2026-07-08 10:00 - 13:00 UTC)

Update - Wed, 08 Jul 2026 12:20:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.zsdpc.net

Mon, 06 Jul 2026 04:02:21 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on July 6th, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Thu, 06 Jul 2026 05:30:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscloud.net

Sun, 05 Jul 2026 19:45:45 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud (Asia Pacific Region) by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sun, 05 Jul 2026 20:10:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZDX Call Quality Monitoring Issue - zdxcloud.net

Sun, 05 Jul 2026 06:26:15 GMT

Zscaler has detected an issue with its zdxcloud.net Cloud. Zscaler has identified an issue affecting the Call Quality Monitoring (CQM) feature on the zdxcloud.net cloud. While customers can still access the ZDX portal, they may find Zoom CQM data unavailable or observe missing call quality information.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Urgent Maintenance: Authentication Service - private.zscaler.com, zpatwo.net

Sat, 04 Jul 2026 14:16:32 GMT

Zscaler will perform urgent maintenance for the Authentication Service between 14:15 UTC to 17:15 UTC on Saturday, July 4, 2026.

There is no impact to end users and this demands no action from our customers.

Update - Sat, 04 Jul 2026 17:27:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance: Authentication Service - zslogin.net

Fri, 03 Jul 2026 17:44:59 GMT

Zscaler will perform urgent maintenance for the Authentication Service between 06:30 UTC to 08:30 UTC on Saturday, July 4, 2026.

During this maintenance window, users may experience intermittent login or portal access issues for approximately 30–45 minutes. This maintenance is required to apply service improvements intended to enhance platform reliability and performance.

Following completion of the maintenance activities, service is expected to operate normally without customer intervention. If you experience any access issues after the maintenance window has concluded, please contact Zscaler Support for assistance.

Update - Sat, 04 Jul 2026 08:21:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reporting and Logging Issue - zscaler.net

Fri, 03 Jul 2026 04:30:12 GMT

Zscaler has detected an issue with its zscaler.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Root cause was attributed to a network issue in the affected infrastructure component.

Update - Fri, 03 Jul 2026 06:03:18 UTC

Zscaler observed weblog lag across zscaler.net. The issue was identified, mitigated, and lag has fully recovered. Services are operating normally and the issue is now resolved.

Toronto III Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Thu, 02 Jul 2026 22:28:50 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Toronto III (YTO3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is July 6, 6:00 pm PDT (July 7, 1:00 UTC)

End time is July 6, 11:00 pm PDT (July 7, 6:00 UTC)

Update - Tue, 07 Jul 2026 05:30:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zdxcloud.net

Thu, 02 Jul 2026 21:31:43 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Thursday at 5:00 PM Pacific Time on July 2, 2026 (Friday, July 3, 2026 12:00 AM UTC), and can take up to 3 hours to complete.

During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

Update - Fri, 03 Jul 2026 02:34:02 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Private Application Session Timeouts with ZIA Inspection Enabled - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 02 Jul 2026 20:50:11 GMT

Zscaler is investigating customer reports of connection timeouts affecting a limited subset of customers who use Zscaler Private Access (ZPA) with Zscaler Internet Access (ZIA) Inspection enabled for certain private application traffic. Affected users may experience connection timeouts or dropped sessions for SSH and other long-lived, non-HTTP private application sessions inspected by ZIA. This issue does not affect all ZPA customers or customers who do not use ZIA Inspection for the affected traffic type.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Preliminary root cause of the issue is attributed to a regression in the Public Service Edge (PSE) software update.

Latest Update - Sun, 12 Jul 2026 06:59:59 UTC

Zscaler has completed the phased deployment of the corrective software update to address the issue. The rollout is now fully complete across all regions and cloud infrastructure globally and the issue is now resolved.

Update - Thu, 02 Jul 2026 21:12:46 UTC

Zscaler has identified the contributing software condition, and a software fix has been developed. The fix is being deployed through a phased rollout. We will provide additional updates as deployment progresses.

Update - Sun, 05 Jul 2026 09:42:59 UTC

Zscaler continues the phased deployment of the corrective software update across affected infrastructure. Deployment has now completed across ZS2, Oceania, and APAC regions, with rollout continuing across the remaining affected EMEA and AMER infrastructure. We will provide further updates as additional progress is made.

Update - Tue, 07 Jul 2026 08:01:15 UTC

Zscaler continues the phased deployment of the corrective software update to address this issue affecting some customers. Deployment has been completed across all ZS2 infrastructure, with significant progress made across ZSNet, ZSCloud, and ZS3. Deployment across the remaining cloud infrastructure in APAC, EMEA, and AMER is ongoing, and Zscaler will provide further updates as progress continues.

Update - Fri, 10 Jul 2026 06:04:36 UTC

Zscaler continues the phased deployment of the corrective software update to address the issue affecting some customers. Deployment is now complete across ZS2, ZS3, and largely complete across ZSNet and ZSCloud infrastructure globally. Zscaler will provide a final update upon completion.

Update - Sun, 12 Jul 2026 06:59:59 UTC

End-of-life for ZscalerOS 24 - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 02 Jul 2026 00:00:00 GMT

Dear Zscaler Customer,

In accordance with our End-of-Life (EOL) policy, Zscaler is formally announcing the EOL of ZscalerOS 24 (ZSOS24) effective December 31, 2026.

To ensure continuous security updates and the latest features, all virtual appliances must transition to ZscalerOS 42 (ZSOS42).

For the Vast Majority of Customers (No Action Required):
- Zscaler has already migrated, or will soon migrate, your ZSOS24 virtual appliances to ZSOS42. If your appliances are eligible for migration, no manual intervention is needed.
For a Minority of Customers (Manual Action Required):
- A limited subset of virtual appliances (specific legacy configurations) are not eligible for automated migration. These appliances must be manually redeployed on ZSOS42. These customers have received and/or will also receive a separate communication from Zscaler.

How to Verify and Next Steps:

To quickly confirm if your specific Zscaler virtual appliance(s) require a manual redeployment, please follow the step-by-step guide in the Zscaler Community.

If your virtual appliance(s) are identified as requiring redeployment, we advise completing the redeployment as soon as possible to ensure uninterrupted service and security updates. Guides for redeploying appliances are available in the step-by-step guide in the Zscaler Community

What if I have more questions?

Contact Zscaler Support using the Support link in the Zscaler help portal or reach out to your Technical Success Manager (TSM).

AI/ML Dictionaries for DLP Policies Issue - zscalertwo.net, zscalerthree.net

Thu, 02 Jul 2026 10:23:16 GMT

Zscaler is investigating an issue affecting the zscalertwo.net cloud that is impacting AI/ML dictionary enforcement for Data Loss Prevention (DLP) policies.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A configuration/model-file mismatch introduced during a recent service update. We have deployed a corrective update to the affected nodes.

Latest Update - Thu, 02 Jul 2026 13:28:30 UTC

Mitigation has been applied and validated on the subset of impacted nodes in the ZS2 (zscalertwo.net) and ZS3 (zscalerthree.net) cloud. This incident is now resolved.

Update - Thu, 02 Jul 2026 11:19:00 UTC

Zscaler has identified the cause and is actively working to mitigate the issue.

Update - Thu, 02 Jul 2026 12:51:09 UTC

Mitigation has been applied and validated on the subset of impacted nodes in the ZS2 (zscalertwo.net) cloud. Engineering teams are now completing the same corrective action on the ZS3 (zscalerthree.net) cloud and will provide a further update once the issue has been fully resolved across all environments.

Update - Thu, 02 Jul 2026 13:28:30 UTC

Mitigation has been applied and validated on the subset of impacted nodes in the ZS2 (zscalertwo.net) and ZS3 (zscalerthree.net) cloud. This incident is now resolved.

Datacenter Expansion SantiagoII (SCL2) - private.zscaler.com, zpatwo.net

Thu, 02 Jul 2026 06:07:59 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in santiago II (SCL2).

These would be available anytime on or after 3rd July 2026.

Region	Location	Notes
AMER	SANTIAGO II	New DC

The IP addresses for the DC are part of the already published IP address range.

Please update your firewall policy rules along with any upstream ACL(s) to allow the IP address ranges to avoid any service disruption.

For more information, please visit:

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.eu.zsdpc.net

Thu, 02 Jul 2026 04:22:28 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on July 2nd, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Thu, 02 Jul 2026 05:40:37 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Addition to Zscaler Hub IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Wed, 01 Jul 2026 20:19:19 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on July 1, 2026, we would like to notify you of the changes to the Zscaler Hub IP Addresses as listed below. These will be effective anytime on or after August 30, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

CIDR	Notes
137.31.134.0/23	New addition to Required Hub IP addresses

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Wed, 01 Jul 2026 20:14:00 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on July 1, 2026, we would like to notify you of the upcoming data center expansions at the locations listed below. These would be available anytime on or after August 30, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
APAC	Mumbai VI	137.31.136.0/23	Expansion of existing data center
APAC	Mumbai VI	137.31.138.0/23	Expansion of existing data center
APAC	Singapore IV	137.31.142.0/23	Expansion of existing data center
APAC	Singapore IV	137.31.144.0/23	Expansion of existing data center
EMEA	Munich I	159.254.212.0/23	Expansion of existing data center
EMEA	Munich I	159.254.214.0/23	Expansion of existing data center

We recommend that you add the IP address ranges listed in the ‘Zscaler Aggregate IP Address Ranges’ section of the CENR pages (refer applicable links below) to your access lists, firewalls, and application allow lists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Intermittent DNS Resolution Failures for Wildcard Domains - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 01 Jul 2026 18:09:24 GMT

Zscaler has detected an issue with its zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net Cloud. Some customers may experience intermittent DNS resolution failures on both Private Service Edge and Public Service Edge.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Preliminary root cause of the issue is attributed to a regression in the Public Service Edge (PSE) software update.

Latest Update - Sun, 12 Jul 2026 06:55:40 UTC

Update - Wed, 01 Jul 2026 22:55:15 UTC

Zscaler has identified the cause of the issue as a software regression in a recent Service Edge software update. The regression may cause some DNS resolution requests to intermittently time out when users access domains that return larger-than-expected DNS responses. Zscaler is applying a validated mitigation across affected infrastructure and is expediting deployment of a corrective software update. We will provide further updates as additional progress is made.

Update - Thu, 02 Jul 2026 22:57:26 UTC

Zscaler has developed a corrective software update and is deploying it in a controlled, phased manner across affected infrastructure. Initial deployment has completed across a subset of affected infrastructure, and rollout will continue across the remaining affected infrastructure. We will provide further updates as additional progress is made.

Update - Sun, 05 Jul 2026 09:42:18 UTC

Update - Tue, 07 Jul 2026 08:00:34 UTC

Zscaler continues the phased deployment of the corrective software update to address the intermittent DNS resolution issue affecting some customers. Deployment has been completed across all ZS2 infrastructure, with significant progress made across ZSNet, ZSCloud, and ZS3. Deployment across the remaining cloud infrastructure in APAC, EMEA, and AMER is ongoing, and Zscaler will provide further updates as progress continues.

Update - Fri, 10 Jul 2026 06:02:36 UTC

Zscaler continues the phased deployment of the corrective software update to address the issue. Deployment is now complete across ZS2, ZS3, and largely complete across ZSNet and ZSCloud infrastructure globally. Zscaler will provide a final update upon completion.

Update - Sun, 12 Jul 2026 06:55:40 UTC

Removal of Custom IP-Based Application Bypass feature from iOS App Profiles in Experience Center and Client Connector Admin Port - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 30 Jun 2026 00:00:00 GMT

Zscaler has removed the Custom IP-Based Application Bypass feature dropdown in iOS App Profiles as the feature isn’t supported by Zscaler Client Connector on iOS devices at this time. Custom IP-Based Application Bypasses are a list of destination IP addresses, subnets, ports and protocols used by specific applications and can be selected in App Profiles to bypass traffic for a specific application when Z-Tunnel 2.0 is used for traffic forwarding.

The Custom IP-Based Application Bypass feature dropdown was incorrectly made available in iOS App Profiles in Experience Center and Client Connector Admin Portal on customer tenants with the introduction of Z-Tunnel 2.0 on iOS. Selection of a custom application using the dropdown in iOS App Profile has no effect on traffic steering in iOS devices.

Existing custom application bypasses under Infrastructure > Common Resources > Application > Custom Application > IP-Based (Custom) are still available for use with Z-Tunnel 2.0 on all other supported platforms.

Who is impacted?

There is no impact to Zscaler Client Connector iOS users.

When are the updates scheduled?:

Zscaler has already started the removal process of the Custom IP-Based Application Bypass dropdown from customer tenants and will complete the change by July 3rd, 2026.

No client-side actions will be required to address this issue, and Zscaler Client Connector will not require an upgrade.

What are my next steps?:

No action is needed for customers who haven’t configured Z-Tunnel 2.0 with Custom IP-Based Application Bypasses in iOS App Profiles.

Customers using Z-Tunnel 2.0 who want to bypass traffic to specific destinations based on destination IP addresses, subnets, ports and protocols should use the IPv4/IPv6 Exclusion feature instead.

To configure IP Exclusion for iOS users in Experience Center:

Edit or create an iOS App Profile by clicking on Infrastructure > Connectors > iOS (Platform Settings) > App Profiles
Navigate to IP Exclusion lists in the TRAFFIC STEERING section and click on the App and IP Bypass tab and enter the list of destinations in IPv4 Exclusion and/or IPv6 Exclusion fields in the IP BYPASSES section
Click Save.

What if I have more questions?:

If you have additional questions, contact Zscaler Support via the Support link in any Admin Portal; a case can be created with Product = Zscaler Client Connector and Type = Question.

RHEL 9.x Boot Issue Impacting ZPA Components During OS Upgrades - private.zscaler.com, zpatwo.net, zpabeta.net

Wed, 01 Jul 2026 00:00:00 GMT

Zscaler is aware of a boot-related issue affecting Red Hat Enterprise Linux (RHEL) 9.x that can impact ZPA infrastructure components, and to share the steps we are taking to protect your environment.

A recent Red Hat update (RHBA-2026:18665, released with RHEL 9.x on May 19, 2026) increased the size of a core system boot file. On the affected components, this larger file can exceed the space available in the system's boot partition, which may prevent the component from starting up properly. It is important to take the required action immediately to prevent disruption.

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Affected Services

ZPA Infrastructure Components: App Connector, Private Service Edge, Network Connector, and Private Cloud Controller
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Who Is Impacted

The following deployment types are not affected:

On-premises virtualization platforms — VMware, Nutanix, and the ZPA Appliance (ZT8010)
Containerized deployments — Docker, Kubernetes, and OpenShift — which do not rely on the impacted boot partition

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Verifying Impact

You can confirm whether your ZPA infrastructure is impacted using two checks.

Step 1 — Check the size of the /boot partition

Run the following command:

df -h

Locate the row mounted on /boot and review the value in the Size column. A /boot partition of approximately 500 MB indicates your deployment may be impacted.

Filesystem                          Size  Used Avail Use% Mounted on
/dev/mapper/rootvg-rootlv            10G  2.5G  7.5G  25% /
/dev/sda1                           536M  373M  164M  70% /boot

In this example, /boot is 536 MB and already 70% full.

Step 2 — Check the size of the initramfs images

Next, inspect the contents of /boot:

ls -lh /boot

Locate the rows for initramfs and review their sizes. If any initramfs image is larger than 100 MB, your deployment is impacted.

Example output (impacted host):

$ ls -lh /boot
total 277M
-rw-------. 1 root root 230M May 31 18:36 initramfs-5.14.0-687.12.1.el9_8.x86_64.img
-rwxr-xr-x. 1 root root  15M Jun 10 11:40 vmlinuz-5.14.0-687.15.1.el9_8.x86_64

In this example, the initramfs image is 230 MB — well above the 100 MB threshold — confirming the host is impacted.

Why this matters

Because the /boot partition is small and already heavily used, it does not have enough free space to hold an additional initramfs image of this size. When the Red Hat kernel update is installed, it can consume the remaining capacity on /boot. The update then fails to complete, and the system is unable to boot successfully afterward.
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What Zscaler Is Doing

Zscaler is actively working with Red Hat on an official fix for this issue and will update this advisory as a permanent resolution becomes available.

Actions Zscaler Has Taken to Protect Your ZPA Components

As a precautionary measure, Zscaler has temporarily disabled automatic OS updates for all affected ZPA components, including App Connector, Private Service Edge, Network Connector, and Private Cloud Controller.

Please note that automatic ZPA Manager updates continue without interruption and are unaffected by this change.
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Required Action

To avoid potential impact, do not perform manual operating system updates on affected components until further guidance is provided by Zscaler. This applies to updates run interactively or through automation, including commands such as;

sudo yum update or sudo yum update -y

Zscaler will notify you directly once an updated image is available and it is safe to resume updates.

Melbourne II (MEL2) Datacenter Network Maintenance - zscalertwo.net

Tue, 30 Jun 2026 18:32:29 GMT

Zscaler will be performing hardware maintenance in the Melbourne II (MEL2) Datacenter.

Maintenance window,
Start: 2026-07-03 19:00 AEST
End: 2026-07-03 22:00 AEST
(i.e. 2026-07-03 09:00 - 12:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Washington DC (WAS1) Datacenter Network Maintenance - zscalerthree.net

Tue, 30 Jun 2026 18:28:26 GMT

Zscaler will be performing hardware maintenance in the Washington DC (WAS1) Datacenter.

Maintenance window,
Start: 2026-07-07 18:00 EDT
End: 2026-07-07 20:00 EDT
(i.e. 2026-07-07 22:00 - 2026-07-08 00:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Tue, 07 Jul 2026 23:55:23 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Montreal I Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Mon, 29 Jun 2026 22:42:58 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Montreal I (YMQ1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is July 2, 6:00 pm PDT (July 3, 1:00 UTC)

End time is July 2, 11:00 pm PDT (July 3, 6:00 UTC)

Update - Fri, 03 Jul 2026 06:04:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Toronto III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 29 Jun 2026 22:32:41 GMT

Zscaler will be enabling IPv6 at our Toronto III (YTO3) Data Center. During the maintenance window the services through YTO3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 1, 6:00 pm PDT (July 2, 1:00 UTC)

End time is July 1, 11:00 pm PDT (July 2, 6:00 UTC)

ZPA Logging Zone Maintenance - private.zscaler.com

Mon, 29 Jun 2026 21:39:36 GMT

We will be performing routine maintenance on our logging infrastructure in the Prod US5 Logging Zone to enhance availability and resiliency. Some customers may witness below impact during this maintenance window:

Admin UI dashboards and diagnostics may display incomplete data temporarily.
If alerts are configured for these components, false events may be triggered.
Nanolog enabled customer will see timeouts on the dashboards.

Important Note:This maintenance will not impact live traffic. ZCC enrollment and ZPA logins will remain unaffected, and all services will continue to operate normally

Update - Tue, 30 Jun 2026 09:06:50 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming New DCs and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Mon, 29 Jun 2026 18:17:25 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on May 15, 2026, we would like to remind you of the upcoming New DCs and expansions at the locations listed below. These would be available anytime on or after July 14, 2026.

Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Toronto III	137.31.56.0/23	Expansion of existing data center
Americas	Honolulu I	137.31.80.0/21	New data center
Americas	Honolulu I	137.31.88.0/23	New data center
Americas	Honolulu I	2605:4300:3d00::/40	New data center
APAC	Beijing III	220.243.158.0/24	Expansion of existing data center
APAC	Tokyo VI	137.31.64.0/20	New data center
APAC	Tokyo VI	2400:7aa0:2f00::/40	New data center

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Seoul I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 29 Jun 2026 16:54:25 GMT

Zscaler will be enabling IPv6 at our Seoul I (SEL1) Data Center. During the maintenance window the services through SEL1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is July 1, 9:00 am PDT (July 1, 16:00 UTC)

End time is July 1, 2:00 pm PDT (July 1, 21:00 UTC)

Update - Wed, 01 Jul 2026 20:21:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

San Francisco IV Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net

Mon, 29 Jun 2026 16:44:33 GMT

Zscaler will be enabling IPv6 at our San Francisco IV (SJC4) Data Center. During the maintenance window the services through SJC4 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 30, 6:00 pm PDT (July 1, 1:00 UTC)

End time is June 30, 11:00 pm PDT (July 1, 6:00 UTC)

Update - Wed, 01 Jul 2026 07:12:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reporting and Logging Issue - zscalertwo.net

Sat, 27 Jun 2026 10:59:37 GMT

Zscaler has detected an issue with its zscalertwo.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue occurred due to an internal service processing disruption.

Latest Update - Sat, 27 Jun 2026 12:05:30 UTC

Update - Sat, 27 Jun 2026 11:11:16 UTC

Update - Sat, 27 Jun 2026 12:05:30 UTC

Paris IV Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Fri, 26 Jun 2026 20:44:27 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Paris IV (PAR4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 30, 9:00 am PDT (June 30, 16:00 UTC)

End time is June 30, 2:00 pm PDT (June 30, 21:00 UTC)

Update - Tue, 30 Jun 2026 23:01:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Maintenance Window Updates - zdxcloud.net

Fri, 26 Jun 2026 20:20:34 GMT

Zscaler performs weekly service updates to continuously enhance cloud performance, introduce new capabilities, and optimize platform services in alignment with its service continuity policy. As part of this ongoing commitment to stability and resiliency, Zscaler is updating its predefined weekly maintenance windows to better support the full range of cloud services and functions while minimizing potential impact to customers.

The new maintenance window schedules will be effective starting July 13, 2026. Service updates for all regions will be recurring.

Time (in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
All Regions			1:00 AM - 3:00 AM	1:00 AM - 3:00 AM		1:00 PM - 5:00 PM	3:00 PM - 6:00 PM
Oceania	10:00 AM - 1:00 PM
Asia Pacific	4:00 PM - 7:00 PM
EMEA	10:00 PM - 1:00 AM
AMER	5:00 AM - 8:00 AM

Update - Wed, 22 Jul 2026 14:20:18 UTC

New schedule is in place starting July 13, 2026. Please contact Zscaler Support if you have additional questions.

New Delhi I Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Fri, 26 Jun 2026 11:05:47 GMT

Zscaler is currently investigating reports of an issue with its New Delhi I datacenter. Customers may encounter disconnections, periods of slowness or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and updates will be posted there as they become available.

Root Cause: Zscaler identified network issue in upstream service provider.

Latest Update - Fri, 26 Jun 2026 14:43:34 UTC

Update - Fri, 26 Jun 2026 12:00:03 UTC

Zscaler identified network instability caused by one of our partners in the New Delhi I data center. At 9:00 AM UTC, Zscaler performed traffic re-engineering to avoid the impacted path. Following this action, we have observed improved performance and are continuing to monitor the situation.

Update - Fri, 26 Jun 2026 14:43:34 UTC

Administration UI and User Authentication Issues - zscalerthree.net

Fri, 26 Jun 2026 09:48:55 GMT

Zscaler has detected an issue with the administration UI and user authentication on its zscalerthree.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Primary CA was recovered

Latest Update - Fri, 26 Jun 2026 11:15:59 UTC

Update - Fri, 26 Jun 2026 10:20:25 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Fri, 26 Jun 2026 11:15:59 UTC

Singapore IV Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Fri, 26 Jun 2026 01:42:54 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Singapore IV (SIN4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 29, 7:00 am PDT (June 29, 14:00 UTC)

End time is June 29, 3:00 pm PDT (June 29, 22:00 UTC)

Update 6/29: Extending Maintenance

Update - Mon, 29 Jun 2026 21:01:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Oslo III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 26 Jun 2026 01:21:12 GMT

Zscaler will be enabling IPv6 at our Oslo III (OSL3) Data Center. During the maintenance window the services through OSL3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 29, 9:00 am PDT (June 29, 16:00 UTC)

End time is June 29, 2:00 pm PDT (June 29, 21:00 UTC)

Update - Mon, 29 Jun 2026 20:50:55 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - APAC Region - zscalerthree.net

Thu, 25 Jun 2026 18:42:27 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the APAC region's datacenters on zscalerthree.net cloud by 3 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.

Update - Fri, 26 Jun 2026 20:15:23 UTC

This activity was completed within the mentioned timeframe. Please contact Zscaler Support if you have additional questions.

Connectivity Issues Affecting India Data Centers - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Thu, 25 Jun 2026 16:38:17 GMT

Zscaler has detected an issue with its Chennai II, Chennai III, Hyderabad I, Mumbai VI, Mumbai VII, New Delhi I datacenter and is currently investigating the matter. We are investigating periods of slowness, connection timeouts and/or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A provider-confirmed cable fault affecting Airtel traffic over the India–Indonesia link caused congestion on impacted international traffic paths; Airtel has confirmed the issue has been resolved.

Latest Update - Mon, 29 Jun 2026 17:54:43 UTC

Following Zscaler mitigation actions and confirmation from Airtel that the issue affecting the India–Indonesia link has been resolved, services have remained stable. Zscaler is considering this incident resolved.

Update - Thu, 25 Jun 2026 16:47:57 UTC

An issue with a third-party network provider has been identified, and Zscaler teams are actively working to address and mitigate the problem.

Update - Thu, 25 Jun 2026 17:10:27 UTC

Zscaler has identified an issue involving a third-party network provider. Our Operations team is actively working to assess the situation and determine mitigation options. We will share additional details as they become available.

Update - Thu, 25 Jun 2026 18:32:37 UTC

Zscaler has confirmed with the service provider that a fiber cut on the India–Indonesia link is resulting in congestion between India and Indonesia. This is impacting customers ability to reach websites and ZPA applications hosted outside of India. The issue has been escalated to the service provider and they have confirmed they are working to correct the issue. In parallel Zscaler teams are working to implement mitigation options to address impact customer may be currently observing. We will provide an additional update in the next 30 minutes on the status of mitigation efforts.

Update - Thu, 25 Jun 2026 19:08:27 UTC

Zscaler has begun implementing mitigation measures across multiple data centers. Mitigation activities have been completed in HYD, MAA2, and MAA3, BOM6 and BOM7 and work is ongoing across the remaining data centers. Customers whose international traffic towards Zscaler continues to traverse Airtel over the India–Indonesia link may still experience impact. Zscaler is actively working with Airtel to implement additional mitigation measures.

Update - Thu, 25 Jun 2026 19:51:43 UTC

Zscaler has completed mitigation actions in the DEL1 data center and has received positive feedback from affected customers. Customers whose international traffic to Zscaler continues to traverse Airtel over the India–Indonesia link may still experience impact. Zscaler is actively working with Airtel to implement additional mitigation measures.

Update - Fri, 26 Jun 2026 21:38:12 UTC

Zscaler mitigation actions remain in place across the affected India data centers, and we continue to observe positive indicators following the completed changes, including improved traffic behavior and customer-reported improvement. There is no material change to the previously communicated customer impact scope. Customers whose international traffic to Zscaler continues to traverse Airtel over the India–Indonesia link may still experience intermittent slowness, connection timeouts, or increased latency while the provider continues restoration activities for the affected network path.

The provider has advised that restoration planning and coordination remain in progress. Zscaler continues to actively monitor traffic behavior, customer experience, and path stability, and will take additional mitigation actions if required. We will provide further updates as provider restoration activity progresses or if there is any material change to customer impact.

Update - Sun, 28 Jun 2026 00:29:11 UTC

Zscaler has received confirmation from Airtel that the issue affecting the India–Indonesia link has been resolved. Zscaler mitigation actions remain in place while we continue to monitor traffic behavior and customer experience to validate sustained stability across the affected India data centers. We will provide further updates if there is any material change.

Update - Mon, 29 Jun 2026 17:54:43 UTC

Warsaw II (WAW2) Datacenter Issue - zscaler.net, zscloud.net

Thu, 25 Jun 2026 09:13:55 GMT

Zscaler has detected an issue with its Warsaw II (WAW2) datacenter and is currently investigating the matter. Customers may encounter disconnections, periods of slowness or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Issue occurred due to an infrastructure-level issue in the affected environment.

Latest Update - Mon, 29 Jun 2026 07:02:27 UTC

Update - Thu, 25 Jun 2026 09:33:19 UTC

Zscaler has identified the issue and developed a fix. Our Zscaler teams are scheduled to deploy the fix during the planned EMEA maintenance window tonight.

Update - Thu, 25 Jun 2026 23:00:38 UTC

Zscaler has deployed a fix for the issue affecting the Warsaw II (WAW2) data center in the zscloud.net cloud during the planned EMEA off-peak maintenance window. Our teams are actively monitoring the environment to validate service stability following the change. Once service stability is confirmed, Zscaler will proceed with additional deployment actions. We will continue to provide updates here as validation progresses.

Update - Fri, 26 Jun 2026 15:35:22 UTC

The Zscaler Operations team has successfully completed deployment of the fix on zscloud.net, and the environment has remained stable with no further issues observed over the past 12 hours. Deployment to zscaler.net is scheduled for today at 20:00 UTC. We will continue to closely monitor the situation to help ensure ongoing stability.

Update - Sat, 27 Jun 2026 00:31:09 UTC

Zscaler has completed deployment of the fix on zscaler.net. The previously deployed fix on zscloud.net has remained stable, and our teams are continuing to monitor the affected environments to validate ongoing service stability. Further updates will be provided if there are any material changes.

Update - Mon, 29 Jun 2026 07:02:27 UTC

Osaka I (OSA1) Critical Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Wed, 24 Jun 2026 22:17:04 GMT

Zscaler will be performing critical hardware maintenance in the Osaka I (OSA1) Datacenter.

Maintenance window,
Start: 2026-07-01 22:00 JST
End: 2026-07-02 02:00 JST
(i.e. 2026-07-01 13:00 - 17:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Wed, 01 Jul 2026 16:51:03 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Vancouver I Datacenter Issue - zscalertwo.net

Wed, 24 Jun 2026 02:55:21 GMT

Zscaler has detected an issue with our Vancouver I datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Issue occurred due to an internal network change that impacted service availability in the affected datacenter.

Latest Update - Wed, 24 Jun 2026 04:35:53 UTC

Following monitoring, the issue affecting the Vancouver I (YVR1) datacenter is now resolved. Service has remained stable and impacted functionality is operating normally. Thank you for your patience.

Update - Wed, 24 Jun 2026 03:33:57 UTC

Zscaler has implemented mitigation measures, and the issue is now mitigated. Service indicators have recovered, and impacted functionality is returning to normal. The team will continue to monitor the environment for sometime and will mark the issue as resolved.

Update - Wed, 24 Jun 2026 04:35:53 UTC

Following monitoring, the issue affecting the Vancouver I (YVR1) datacenter is now resolved. Service has remained stable and impacted functionality is operating normally. Thank you for your patience.

ZPA Diagnostic logs Issue - private.zscaler.com

Wed, 24 Jun 2026 01:18:59 GMT

Zscaler is currently investigating reports of issues with its private.zscaler.com Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Issue occurred due to an internal processing issue

Latest Update - Wed, 24 Jun 2026 03:45:28 UTC

Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational.

Update - Wed, 24 Jun 2026 01:58:01 UTC

Update - Wed, 24 Jun 2026 02:41:27 UTC

Zscaler have implemented a mitigation measure, and the issue is now mitigated. Service indicators have recovered, and impacted functionality is returning to normal. Logs are also catching up and are expected to fully sync shortly. The team will continue to monitor the environment closely to ensure full stabilization and confirm complete recovery.

Update - Wed, 24 Jun 2026 03:45:28 UTC

Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational.

China Premium Access Plus Datacenter (Beijing V) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 23 Jun 2026 20:18:52 GMT

Beijing V DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus Services within this data center may experience intermittent disconnections.

Start Time: 2026-07-17 14:00:00 UTC

End Time: 2026-07-17 22:00:00 UTC
(Datacenter Local Time 2026-07-17 22:00 - 2026-07-18 06:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Fri, 17 Jul 2026 19:05:17 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

National Vulnerability Database (NVD) Connector Synchronization Failures - app.avalor.io, app.eu.avalor.io, app.aps.avalor.io

Tue, 23 Jun 2026 00:00:00 GMT

Zscaler is aware of an issue affecting the National Vulnerability Database (NVD) Connector, resulting in failures during incremental synchronization of vulnerability data. Zscaler investigation has determined that the issue is caused by a service degradation affecting the National Vulnerability Database (NVD) REST API, which the connector relies upon to retrieve vulnerability information.

Customer Impact

Customers using the NVD Connector may experience:

Failed incremental synchronization attempts.
Delays in importing newly published or updated Common Vulnerabilities and Exposures (CVEs).
Delayed visibility of the latest vulnerability information within the platform.

Existing vulnerability data already present in the platform remains available.

Current Status

Zscaler has confirmed that the failures are the result of unexpected responses being returned by the NVD API service. As a result, connector synchronization requests are unable to complete successfully.

The issue is external to Zscaler services and is currently dependent on restoration of normal operations by the NVD service provider.

Zscaler has engaged with the NVD service provider to obtain additional information and an estimated timeline for resolution.

Workaround: There is currently no customer-side workaround available while the upstream NVD service degradation persists.

Next Steps: Zscaler continues to actively monitor the situation. Updates will be provided as additional information becomes available or when service restoration has been confirmed.

Update - Tue, 30 Jun 2026 18:37:23 UTC

Zscaler has resolved the issue affecting National Vulnerability Database (NVD) connector incremental synchronization. The issue was caused by a degradation affecting an external third-party API used to retrieve vulnerability data. To permanently address the issue, Zscaler migrated the connector to an alternative API for retrieving NVD vulnerability information. The migration has been successfully completed, and normal synchronization of vulnerability data has been fully restored. As part of the recovery effort, Zscaler is also backfilling any Common Vulnerabilities and Exposures (CVE) data that may not have been synchronized during the impact period of June 16–23. Customers can expect the missing vulnerability data to be populated automatically as the backfill process completes.

Tokyo IV (TYO4) Critical Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Tue, 23 Jun 2026 19:01:09 GMT

Zscaler will be performing critical hardware maintenance in the Tokyo IV (TYO4) Datacenter.

Maintenance window,
Start: 2026-06-27 01:00 JST
End: 2026-06-27 05:00 JST
(i.e. 2026-06-26 16:00 - 20:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Fri, 26 Jun 2026 17:24:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Intermittent 403 Errors - zslogin.net

Tue, 23 Jun 2026 11:09:35 GMT

Zscaler has detected an issue with its zslogin.net Cloud. Customers may experience intermittent 403 errors when attempting to access zslogin.net.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A fix was deployed to restore stability following a software defect.

Latest Update - Tue, 23 Jun 2026 12:34:49 UTC

Update - Tue, 23 Jun 2026 11:29:48 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Tue, 23 Jun 2026 12:34:49 UTC

Authentication Errors Affecting Zscaler Client Connector (ZCC) API Requests via the Authentication Service - zscalertwo.net, zscalerthree.net

Tue, 23 Jun 2026 01:10:30 GMT

Zscaler is investigating an issue impacting a subset of customers where API requests to the Zscaler Client Connector (ZCC) APIs through the Authentication Service (ZIdentity) may return HTTP 401 responses. Other API services may continue to operate as expected.

Zscaler teams are actively investigating the issue and working to identify the cause. We will provide additional updates as more information becomes available. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue occurred due to an internal configuration propagation failure

Update - Tue, 23 Jun 2026 01:45:34 UTC

Zscaler has resolved the issue impacting a subset of customers where API requests to the Zscaler Client Connector (ZCC) APIs were returning authentication errors. Zscaler teams investigated the issue, applied the necessary measures, and implemented a fix to fully restore service. The issue has been fully resolved and services are now operating normally.

Update - Tue, 23 Jun 2026 01:50:05 UTC

Following the actions previously taken by Zscaler, the incident has been resolved.

Mumbai VI Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Mon, 22 Jun 2026 22:49:19 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Mumbai VI (BOM6) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 26, 10:00 am PDT (June 26, 17:00 UTC)

End time is June 26, 3:00 pm PDT (June 26, 22:00 UTC)

Update - Fri, 26 Jun 2026 20:52:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Madrid IV Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Mon, 22 Jun 2026 22:42:24 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Madrid IV (MAD4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 25, 9:00 am PDT (June 25, 16:00 UTC)

End time is June 25, 2:00 pm PDT (June 25, 21:00 UTC)

Update - Thu, 25 Jun 2026 21:25:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZTW Control Gateway Connection Degradation - zscaler.net

Mon, 22 Jun 2026 20:14:18 GMT

Zscaler has detected and is investigating a service degradation affecting ZTW Control Gateway connectivity within the zscaler.net cloud. Customers using Zero Trust SD-WAN Devices (ZTW) devices, Cloud Connectors, and Branch Connectors may experience issues establishing new connections or reconnecting to the service. Previously established connections may continue to operate; however, connectivity behavior may vary depending on existing session and cache states.

Zscaler teams are actively investigating the issue and working to restore normal service. We will provide additional updates as more information becomes available. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A software regression introduced during a recent update affected the availability of ZTW Control Gateway services, resulting in connectivity issues for newly established connections.

Latest Update - Mon, 22 Jun 2026 21:54:10 UTC

Zscaler has restored service for the issue affecting ZTW Control Gateway connections. Our teams have verified service recovery and continue to monitor the environment to ensure ongoing stability.

Update - Mon, 22 Jun 2026 21:32:46 UTC

Zscaler has identified the cause of the issue and is actively working to restore normal service. We will continue to provide updates as additional information becomes available.

Update - Mon, 22 Jun 2026 21:54:10 UTC

Zscaler has restored service for the issue affecting ZTW Control Gateway connections. Our teams have verified service recovery and continue to monitor the environment to ensure ongoing stability.

Upcoming Data Center Expansion in Zpa - private.zscaler.com

Mon, 22 Jun 2026 19:33:08 GMT

As part of our regular expansion of capacity, we are adding additional ZPA Public Service Edge nodes to our existing data center in Seattle (SEA1) for Zpa cloud.

These would be available anytime on or after June 25, 2026.

Region	Location	Notes
AMERICAS	SEATTLE	Expansion of Existing DC

The IP addresses for the DC are part of the already published IP address range.

Please update your firewall policy rules along with any upstream ACL(s) to allow the IP address ranges to avoid any service disruption.

For more information, please visit:

Update - Sat, 27 Jun 2026 04:24:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZDX Admin Portal – Reporting and Logging Delay - zdxcloud.net

Mon, 22 Jun 2026 18:53:01 GMT

Zscaler has detected an issue with Reporting and Logging on its zdxcloud.net Cloud. Customers may experience gaps in ZDX telemetry data.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A service processing issue caused delays in data handling and resulted in intermittent data gaps for some customers.

Latest Update - Wed, 24 Jun 2026 17:47:38 UTC

After implementing the corrective changes earlier, service performance has remained stable and ZDX telemetry data is now available. We are continuing enhanced monitoring to validate sustained system health and normal data flow.

Update - Mon, 22 Jun 2026 18:56:58 UTC

Zscaler has implemented the necessary mitigation measures, and we are now able to see the live ZDX data.

Update - Tue, 23 Jun 2026 00:24:34 UTC

Services have remained stable since restoration, and we continue to closely monitor the environment to ensure ongoing stability. We will provide further updates as they become available.

Update - Tue, 23 Jun 2026 05:24:19 UTC

Services have remained stable since restoration, and we continue to closely monitor the environment to ensure ongoing stability. No further degradation has been observed at this time. We will provide further updates as they become available.

Update - Tue, 23 Jun 2026 15:33:22 UTC

The issue has reoccurred, and we are currently seeing gaps in ZDX score data. The appropriate team is engaged and investigating. Further updates will be shared as available.

Update - Tue, 23 Jun 2026 19:29:52 UTC

We identified the cause of the recent data delays affecting some EU customers and have applied changes to stabilize the service. Recovery is well underway, most of the missing data has already been restored, and we are not seeing new gaps at this time. We are continuing to monitor the platform closely and working to fully clear the remaining backlog.

Update - Tue, 23 Jun 2026 23:56:01 UTC

Zscaler has restored the affected service and continues to monitor recovery closely. The remaining backlog continues to decrease, and the majority of delayed data has now been processed. We are not observing new data gaps at this time, and service performance has remained stable following the changes implemented earlier. Our teams are continuing to validate data completeness and monitor the platform to ensure recovery progresses as expected. We will provide an update once monitoring activities are complete.

Update - Wed, 24 Jun 2026 17:47:38 UTC

New York IV (NYC4) Datacenter Network Maintenance - zscalertwo.net

Mon, 22 Jun 2026 17:11:15 GMT

Zscaler will be performing hardware maintenance in the New York IV (NYC4) Datacenter.

Maintenance window,
Start: 2026-06-23 18:00 EST
End: 2026-06-23 20:00 EST
(i.e. 2026-06-23 22:00 - 2026-06-24 00:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 23 Jul 2026 23:37:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New Policy Issue - zscaler.net

Mon, 22 Jun 2026 09:00:14 GMT

Zscaler is actively investigating a potential intermittent connectivity and performance issue affecting zscaler.net Cloud that may be impacting some customers. Our teams are currently assessing the scope and cause. We will provide an update as soon as more information becomes available.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: An internal processing limitation led to delays in propagating changes during a period of elevated activity.

Latest Update - Mon, 22 Jun 2026 14:52:36 UTC

Update - Mon, 22 Jun 2026 09:08:47 UTC

We have identified a Zscaler service issue affecting some customers in the EMEA region. At this time, the impact is limited to newly created policies, and no authentication or performance issues are expected for existing users. Our teams are actively working to mitigate the issue and restore normal service. We will continue to provide updates as new information becomes available.

Update - Mon, 22 Jun 2026 11:43:32 UTC

Mitigation actions have been successfully implemented, and recovery has been observed as the lag continues to catch up. Zscaler teams remain actively engaged and continue to monitor the environment.

Update - Mon, 22 Jun 2026 14:04:46 UTC

Zscaler confirmed that lag has now recovered and all newly created policies can be enforced. We will continue to monitor situation closely.

Update - Mon, 22 Jun 2026 14:52:36 UTC

Scheduled Maintenance Extended - AMER Region - zscaler.net

Sun, 21 Jun 2026 11:59:30 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the AMER region's datacenters on zscaler.net cloud by 3 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.

Update - Sun, 21 Jun 2026 14:43:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Hyderabad I, Kolkata I, Mumbai VI, Mumbai VII, New Delhi I datacenters - zscalerthree.net

Fri, 19 Jun 2026 15:49:33 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Hyderabad I, Kolkata I, Mumbai VI, Mumbai VII, New Delhi I datacenters on the zscalerthree.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 19 Jun 2026 18:58:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Intermittent Traffic Related Issues - zscaler.net

Fri, 19 Jun 2026 15:33:20 GMT

Zscaler has identified an intermittent issue affecting a small subset of service edges in the zscaler.net cloud and is actively investigating the matter. Customers may experience intermittent slowness, connection timeouts, or increased latency.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue was caused by gradual memory resource exhaustion on a subset of Service Edges within the zscaler.net cloud.

Latest Update - Mon, 22 Jun 2026 22:21:12 UTC

Update - Fri, 19 Jun 2026 18:20:01 UTC

Zscaler continues to take corrective action on the identified Service Edges as part of the ongoing mitigation effort. We are actively monitoring the environment to validate stability while root cause investigation and permanent corrective action planning continue. Further updates will be provided as they become available.

Update - Sat, 20 Jun 2026 05:54:54 UTC

Zscaler teams have implemented the necessary measures to mitigate the issue and are actively monitoring the environment to validate sustained stability. Further updates will be provided as they become available.

Update - Sat, 20 Jun 2026 19:14:15 UTC

Services have remained stable since the previous update. Zscaler will continue active monitoring to confirm sustained stability through upcoming peak traffic periods. The next update will be provided as additional information becomes available, or sooner if there is a material change.

Update - Mon, 22 Jun 2026 22:21:12 UTC

Scheduled Maintenance Extended - AMER Region - zscloud.net

Fri, 19 Jun 2026 05:55:11 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance for AMER Region by two hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 19 Jun 2026 07:39:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Cybersecurity Insight Report, Company Risk Score, and Patient Zero security alerts issue - zscaler.net, zscloud.net, zscalerthree.net

Fri, 19 Jun 2026 05:35:40 GMT

Zscaler has detected an issue with the Cybersecurity Insight Report, Company Risk Score, and Patient Zero security alerts on the zscaler.net, zscloud.net, and zscalerthree.net Clouds.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A recent fix introduced an unintended change in system behavior, which resulted in a significant increase in transaction volume.

Latest Update - Mon, 22 Jun 2026 13:03:35 UTC

Update - Fri, 19 Jun 2026 05:52:33 UTC

Zscaler has identified the root cause as an unexpected log volume surge following a recent software update and is currently rolling out a corrected build. The fix is expected to be deployed to impacted clouds and data centers by the end of June 21, 2026. and further details will be shared once available.

Update - Mon, 22 Jun 2026 06:09:52 UTC

Zscaler has successfully mitigated the underlying issue causing the data processing lag affecting ZIA Reporting & Analytics on the zscaler.net, zscloud.net, and zscalerthree.net clouds. Our engineering teams are currently performing final validation checks to confirm that all affected services are fully restored. We appreciate your patience and will provide a final update once all validation checks are complete.

Update - Mon, 22 Jun 2026 13:03:35 UTC

Authentication Service Upgrade - zslogin.net

Fri, 19 Jun 2026 00:23:25 GMT

Zscaler will perform planned maintenance for the Authentication Service between 11:30 UTC and 13:30 UTC on Friday, June 19, 2026. This maintenance includes feature enhancements and bug fixes designed to improve platform reliability and performance.

During the maintenance window, users may experience intermittent login or portal access issues for approximately 30–45 minutes. Following completion of the maintenance activities, service is expected to operate normally without customer intervention.

If you experience any access issues after the maintenance window has concluded, please contact Zscaler Support for assistance.

Update - Fri, 19 Jun 2026 13:19:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - EMEA Region - zscloud.net

Thu, 18 Jun 2026 22:47:32 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's datacenters on zscloud.net cloud by 3 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.

Update - Thu, 25 Jun 2026 18:12:09 UTC

This activity was completed within the mentioned timeframe. Please contact Zscaler Support if you have additional questions.

Manchester II Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Thu, 18 Jun 2026 22:26:51 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Manchester II (MAN2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Start time is June 25, 2:00 pm PDT (June 25, 21:00 UTC)

End time is June 25, 7:00 pm PDT (June 26, 2:00 UTC)

Update - Fri, 26 Jun 2026 01:45:50 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Shanghai II Datacenter Scheduled Maintenance - Service Expansion - zscaler.net, zscloud.net

Thu, 18 Jun 2026 22:24:03 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Shanghai II (SHA2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Start time is June 24, 9:00 am PDT (June 24, 16:00 UTC)

End time is June 24, 5:00 pm PDT (June 25, 00:00 UTC)

Update 6/24/26: Extending maintenance

Update - Thu, 25 Jun 2026 02:30:50 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Madrid III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 18 Jun 2026 22:19:53 GMT

Zscaler will be enabling IPv6 at our Madrid III (MAD3) Data Center. During the maintenance window the services through MAD3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 24, 9:00 am PDT (June 24, 16:00 UTC)

End time is June 24, 4:00 pm PDT (June 24, 23:00 UTC)

Update 6/24: Extending maintenance

Stockholm III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 18 Jun 2026 22:12:16 GMT

Zscaler will be enabling IPv6 at our Stockholm III (STO3) Data Center. During the maintenance window the services through STO3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 23, 9:00 am PDT (June 23, 16:00 UTC)

End time is June 23, 4:00 pm PDT (June 23, 23:00 UTC)

Update - Wed, 24 Jun 2026 02:48:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zurich I Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Thu, 18 Jun 2026 22:02:36 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Zurich I (ZRH1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Start time is June 22, 10:00 am PDT (June 22, 17:00 UTC)

End time is June 22, 3:00 pm PDT (June 22, 22:00 UTC)

Update - Mon, 22 Jun 2026 20:02:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hong Kong III Datacenter Scheduled Maintenance – IPv6 Enablement - zscaler.net, zscloud.net

Thu, 18 Jun 2026 21:55:10 GMT

Zscaler will perform scheduled maintenance at our Hong Kong III (HKG3) Data Center to complete preparatory work for future IPv6 enablement.

During the maintenance window, services through the HKG3 Data Center may be restarted in phases to minimize impact.

Other Zscaler sites and services will continue to operate normally.

Maintenance Window:

Start time is June 22, 9:00 am PDT (June 22, 16:00 UTC)

End time is June 22, 1:00 pm PDT (June 22, 20:00 UTC)

Update - Mon, 22 Jun 2026 20:05:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Washington I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Thu, 18 Jun 2026 17:59:10 GMT

Zscaler will be enabling IPv6 at our Washington I (WAS1) Data Center. During the maintenance window the services through WAS1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 22, 6:00 pm PDT (June 23, 1:00 UTC)

End time is June 22, 11:00 pm PDT (June 23, 6:00 UTC)

Update - Tue, 23 Jun 2026 07:46:59 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Dallas I, Dallas II, New York III, New York IV datacenters - zscaler.net

Thu, 18 Jun 2026 07:32:21 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Dallas I, Dallas II, New York III, New York IV datacenters on the zscaler.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 18 Jun 2026 10:41:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Dallas I, Dallas II, Washington DC, Washington DC IV datacenters - zscloud.net

Thu, 18 Jun 2026 07:28:37 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Dallas I, Dallas II, Washington DC, Washington DC IV datacenters on the zscloud.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 18 Jun 2026 10:41:44 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Experience Center Default Sign-on - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net, zslogin.net

Wed, 17 Jun 2026 00:00:00 GMT

What	Zscaler is standardizing the post-login landing experience so that tenants move to the Zscaler Experience Center as the steady-state destination instead of the Authentication Service.
Action Required	No action is necessary. Zscaler encourages customers to utilize the Experience Center, as standalone portals are being phased out by Sept 30, 2026.
Availability	Change is happening on June 19, 2026

What is changing

Zscaler is revising the Admin login redirection process to support the ongoing phase-out of legacy standalone portals and the transition to the Experience Center. Effective June 19, 2026, Admins logging in via external IdP portals will be directed to the Zscaler Experience Center rather than the Authentication Service.

Login Experience

Starting Jun 19, 2026: Customers are redirected to Experience Center following authentication.

Customers can still access the ZSlogin page by going to domain.zslogin.net. Standalone portals will also continue to be accessible.

Zscaler launched banners on customer standalone portals to facilitate initial communication. This will provide customers with advanced notice about the forthcoming redirection change.

Who is impacted

All customer tenants are set to be redirected to the Experience Center.

NSS Exclude Filter Configuration Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 17 Jun 2026 19:25:00 GMT

Zscaler is investigating an issue affecting Nanolog Streaming Service (NSS) feed filtering. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A software defect affecting NSS feed filtering behavior could prevent logs from being forwarded to configured SIEM destinations when the URL Category Exclusion option was used.

Latest Update - Mon, 22 Jun 2026 20:42:32 UTC

Update - Wed, 17 Jun 2026 20:13:32 UTC

Zscaler is investigating an issue affecting Nanolog Streaming Service (NSS) feed filtering. Customers who configure NSS feeds using the Exclude Filter option may experience unintended behavior resulting in log delivery interruptions to their configured SIEM destination. Instead of excluding only the selected URL category, the filter may prevent logs from being forwarded through the affected NSS feed. This issue may affect customers across all ZIA cloud environments that utilize the NSS Exclude Filter functionality.

As a workaround, customers should avoid using the Exclude Filter option. Customers currently using this configuration should review and remove the Exclude Filter setting and verify that log delivery resumes as expected. Customers who require filtering may alternatively use the Include Filter option to explicitly select the URL categories that should be forwarded through the NSS feed.

Zscaler teams are actively investigating this issue to identify the underlying cause and develop a permanent resolution. Until a fix is available, customers should utilize the documented workaround described above. We will continue to provide updates as more information becomes available.

Update - Thu, 18 Jun 2026 07:27:01 UTC

Zscaler has identified a permanent fix. The fix is being deployed to ZS2 and ZS3 Cloud this week, with deployment to additional clouds to follow. We are actively working on the deployment plan for the remaining clouds and will provide timelines as they become available.

Update - Sat, 20 Jun 2026 19:27:10 UTC

Zscaler has completed remediation for zscaler.net, zscalerone.net, zscalertwo.net, and zscloud.net. Remediation for zscalerthree.net is scheduled during the regular maintenance window on Sunday, June 21, 2026. Customers on zscalerthree.net should continue to use the documented workaround until remediation is completed. A further update will be provided once the remaining remediation activity is complete.

Update - Sun, 21 Jun 2026 06:18:50 UTC

Zscaler has completed remediation for all affected clouds.The issue affecting Nanolog Streaming Service (NSS) feed filtering now stands fully mitigated. We will continue to monitor the environment to ensure ongoing stability.

Update - Mon, 22 Jun 2026 20:42:32 UTC

Frankfurt IV (FRA4) Datacenter Network Maintenance - zscaler.net

Wed, 17 Jun 2026 17:14:30 GMT

Zscaler will be performing hardware maintenance in the Frankfurt IV (FRA4) Datacenter.

Maintenance window,
Start: 2026-06-18 20:00 CEST
End: 2026-06-18 22:00 CEST
(i.e. 2026-06-18 18:00 - 20:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Thu, 18 Jun 2026 19:37:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo IV (TYO4) Datacenter Network Maintenance - zscalertwo.net, zscalerthree.net

Wed, 17 Jun 2026 17:18:54 GMT

Zscaler will be performing hardware maintenance in Tokyo IV (TYO4) Datacenter.

Scheduled Maintenance window,
Start: 2026-06-24 12:00 UTC
End: 2026-06-24 15:00 UTC
(Local Time 2026-06-24 21:00 - 2026-06-25 00:00 JST)

Update - Wed, 24 Jun 2026 15:43:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Brussels (BRU2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net

Wed, 17 Jun 2026 17:09:46 GMT

Zscaler will be performing hardware maintenance in the Brussels II (PAR4) Datacenter.

Maintenance window,
Start: 2026-06-18 19:30 CEST
End: 2026-06-18 21:30 CEST
(i.e. 2026-06-18 17:30 - 19:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Thu, 18 Jun 2026 21:42:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Munich I (MUC1) Datacenter Network Maintenance - zscaler.net, zscloud.net

Tue, 16 Jun 2026 15:59:45 GMT

Zscaler will be performing hardware maintenance in the Munich I (MUC1) Datacenter.

Maintenance window,
Start: 2026-06-17 20:00 CEST
End: 2026-06-17 23:00 CEST
(i.e. 2026-06-17 18:00 - 21:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Thu, 17 Jun 2026 20:13:50 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester II (MAN2) Datacenter Network Maintenance - zscaler.net

Tue, 16 Jun 2026 15:57:37 GMT

Zscaler will be performing hardware maintenance in the Manchester II (MAN2) Datacenter.

Maintenance window,
Start: 2026-06-17 22:00 BST
End: 2026-06-18 01:00 BST
(i.e. 2026-06-17 21:00 - 2026-06-18 00:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Wed, 17 Jun 2026 23:07:39 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta II (ATL2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Tue, 16 Jun 2026 05:51:45 GMT

Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.

Maintenance window,
Start: 2026-06-17 03:00 EDT
End: 2026-06-17 07:00 EDT
(i.e. 2026-06-17 07:00 - 11:00 UTC)

Update - Wed, 17 Jun 2026 09:56:29 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on AMER Region - zscloud.net

Tue, 16 Jun 2026 05:20:18 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on AMER Region on the zscloud.net cloud. This maintenance can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Tue, 16 Jun 2026 08:22:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on AMER Region - zscaler.net

Tue, 16 Jun 2026 05:17:07 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on AMER Region on the zscaler.net cloud. This maintenance can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Tue, 16 Jun 2026 09:02:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 16 Jun 2026 00:14:30 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on June 15, 2026, we would like to notify you of the upcoming data center expansions at the locations listed below. These would be available anytime on or after August 14, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Chicago	137.31.114.0/23	Expansion of existing data center
Americas	Chicago II	137.31.116.0/23	Expansion of existing data center

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Johannesburg III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 15 Jun 2026 22:00:54 GMT

Zscaler will be enabling IPv6 at our Johannesburg III (JNB3) Data Center. During the maintenance window the services through JNB3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 17, 9:00 am PDT (June 17, 16:00 UTC)

End time is June 17, 6:00 pm PDT (June 18, 1:00 UTC)

Update 6/17: Extending Maintenance

Update - Thu, 18 Jun 2026 01:04:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo IV Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Mon, 15 Jun 2026 21:51:02 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Tokyo IV (TYO4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Start time is June 17, 9:00 am PDT (June 17, 16:00 UTC)

End time is June 17, 2:00 pm PDT (June 17, 21:00 UTC)

Update - Wed, 17 Jun 2026 20:38:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Intermittent Connectivity Issues Impacting a Subset of Destinations - zscaler.net, zscloud.net

Mon, 15 Jun 2026 20:50:32 GMT

Zscaler is investigating an issue that may affect connectivity when accessing a subset of destinations. Based on our current assessment, impacted customers may experience application access failures, connection timeouts, and website reachability issues. The impact is intermittent and may vary depending on the service path used to process individual user sessions, including traffic traversing Public Service Edge and Private Service Edge infrastructure.

Our teams are actively investigating to determine the cause and fully assess the scope of impact. The customer impact described above reflects our current understanding and may be updated as the investigation progresses.

We will provide additional updates as more information becomes available. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A infrastructure upgrade triggered a latent issue in a subset of cloud enforcement nodes, causing intermittent traffic processing failures for certain user sessions until the affected nodes were remediated.

Latest Update - Wed, 17 Jun 2026 22:51:22 UTC

Update - Tue, 16 Jun 2026 00:49:59 UTC

Zscaler have identified potential mitigation actions and are performing additional verification and validation activities before broader implementation. Based on our continued assessment, we have confirmed customer impact. Impacted customers may experience intermittent application access failures, connection timeouts, and website reachability issues when accessing a subset of destinations. The impact remains intermittent and may vary across users and sessions. Our teams continue to investigate the underlying cause and evaluate the overall scope of impact. We will continue to provide updates as more information becomes available.

Update - Tue, 16 Jun 2026 08:47:24 UTC

Zscaler has identified the underlying issue and is actively applying remediation across affected infrastructure. We have validated an effective mitigation and are continuing rolling restarts of affected service nodes. This action has successfully restored service on remediated instances, and customer impact is decreasing as additional restart waves proceed.

Update - Tue, 16 Jun 2026 19:12:28 UTC

Zscaler is continuing remediation activities across affected service infrastructure. Restart actions on impacted nodes have been completed in APAC, Oceania, and AMER. Additional restart activity for the remaining affected EMEA infrastructure is planned during the standard 8:00 PM UTC maintenance window. This remediation has been effective in restoring normal traffic handling on remediated instances, and we will continue to provide updates as execution progresses.

Update - Tue, 16 Jun 2026 22:53:06 UTC

Zscaler has completed remediation activities across the affected service infrastructure. Service has been restored, and customer impact related to intermittent application access failures, connection timeouts, and destination reachability issues has been mitigated. Post-remediation validation has been completed, and service is operating normally. Our teams will continue to monitor the environment closely.

Update - Wed, 17 Jun 2026 22:51:22 UTC

China Premium Access Plus Shanghai Datacenter (Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 15 Jun 2026 20:10:30 GMT

Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus services within these data centres may experience intermittent disconnections.

Start Time: 2026-07-03 14:00:00 UTC
End Time: 2026-07-03 22:00:00 UTC
(Datacenter Local Time 2026-07-03 22:00 - 2026-07-04 06:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Provider advised maintenance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Fri, 03 Jul 2026 18:02:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscloud.net

Sun, 14 Jun 2026 05:51:14 GMT

Update - Sun, 14 Jun 2026 08:06:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Madrid IV Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 12 Jun 2026 20:31:00 GMT

Zscaler will be enabling IPv6 at our Madrid IV (MAD4) Data Center. During the maintenance window the services through MAD4 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 16, 10:00 am PDT (June 16, 17:00 UTC)

End time is June 16, 4:00 pm PDT (June 16, 22:00 UTC)

Update - Tue, 16 Jun 2026 23:11:06 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Osaka I Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Fri, 12 Jun 2026 18:49:50 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Osaka I (OSA1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Start time is June 16, 9:00 am PDT (June 16, 16:00 UTC)

End time is June 16, 4:00 pm PDT (June 16, 23:00 UTC)

Update 6/16: Extending Maintenance

Update - Tue, 16 Jun 2026 23:02:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net, zscloud.net

Fri, 12 Jun 2026 17:07:25 GMT

Zscaler will be enabling IPv6 at our Chicago (CHI1) Data Center. During the maintenance window the services through CHI1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 15, 6:00 pm PDT (June 16, 1:00 UTC)

End time is June 15, 11:00 pm PDT (June 16, 6:00 UTC)

Update - Tue, 16 Jun 2026 06:11:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Performance issues - private.zscaler.com

Fri, 12 Jun 2026 15:01:01 GMT

Zscaler has detected an issue with its private.zscaler.com Cloud. We are currently investigating period of slowness, latency or connection timeouts while accessing ZPA Applications.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Elevated DNS traffic conditions resulted in a degradation of ZPA control plane services, impacting customers' ability to establish new connections to private applications.

Latest Update - Mon, 15 Jun 2026 23:49:32 UTC

Following a period of sustained stability and monitoring, Zscaler has confirmed that the affected services are operating normally. This incident has been resolved. We will continue to monitor the environment to ensure sustained stability.

Update - Fri, 12 Jun 2026 15:17:21 UTC

We have identified the root cause of the issue and working on resolution.

Update - Fri, 12 Jun 2026 15:26:52 UTC

Zscaler teams are actively investigating the potential cause and working to implement appropriate mitigation measures.

Update - Fri, 12 Jun 2026 15:35:55 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. We have received few positive feedback from affected customers. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Fri, 12 Jun 2026 15:38:44 UTC

Zscaler has implemented changes to mitigate the issue, and our team is actively monitoring service recovery for affected customers.

Update - Fri, 12 Jun 2026 16:26:51 UTC

Following the initial mitigation actions, affected customers observed improvement. Zscaler is continuing to work toward full mitigation.

Update - Fri, 12 Jun 2026 16:49:51 UTC

We have implemented additional mitigation steps and are seeing further improvement for affected customers. We continue to monitor the environment closely.

Update - Fri, 12 Jun 2026 17:47:09 UTC

Additional mitigation measures have been implemented and affected customers have experienced continued service improvement. We are actively monitoring the environment to ensure stability is maintained while our investigation into the underlying cause continues.

Update - Mon, 15 Jun 2026 23:49:32 UTC

Following a period of sustained stability and monitoring, Zscaler has confirmed that the affected services are operating normally. This incident has been resolved. We will continue to closely monitor the environment to ensure sustained stability.

New Delhi I Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Fri, 12 Jun 2026 00:20:33 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our New Delhi I (DEL1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 15, 10:00 am PDT (June 15, 17:00 UTC)

End time is June 15, 5:00 pm PDT (June 16, 00:00 UTC)

Update 6/15: Extending maintenance

Update - Tue, 16 Jun 2026 00:12:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Fri, 12 Jun 2026 00:05:33 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Mumbai VI (BOM6) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 15, 10:00 am PDT (June 15, 17:00 UTC)

End time is June 15, 6:00 pm PDT (June 16, 1:00 UTC)

Update 6/15: Extending maintenance

Update - Tue, 16 Jun 2026 04:00:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai III Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Thu, 11 Jun 2026 20:32:51 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chennai III (MAA3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 12, 2:00 pm PDT (June 12, 21:00 UTC)

End time is June 12, 7:00 pm PDT (June 13, 2:00 UTC)

Update - Sat, 13 Jun 2026 02:26:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 11 Jun 2026 18:05:59 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Zscaler Management Portal for Partners and ZDX Admin Portal might not be available. This maintenance is scheduled for Thursday at 8:00 PM Pacific Time on June 11, 2026 (Friday, June 12, 2026 03:00 AM UTC), and can take up to 3 hours to complete. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 12 Jun 2026 06:53:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscalerone.net

Thu, 11 Jun 2026 17:56:48 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 12:00 AM Pacific Time on June 12, 2026 (Friday, June 12, 2026 07:00 AM UTC), and can take up to 4 hours to complete.

Update - Fri, 12 Jun 2026 10:28:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Administration UI Issue - zscaler.net

Thu, 11 Jun 2026 13:14:15 GMT

Zscaler has detected an issue with the administration UI on its zscaler.net Cloud. We are investigating periods of slowness, connection timeouts and/or increased latency.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Temporary performance degradation in the Admin UI environment caused intermittent slowness.

Latest Update - Thu, 11 Jun 2026 19:33:26 UTC

Update - Thu, 11 Jun 2026 13:29:56 UTC

Update - Thu, 11 Jun 2026 14:51:28 UTC

We have identified the root cause of the issue and working on resolution.

Update - Thu, 11 Jun 2026 15:37:18 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Thu, 11 Jun 2026 19:33:26 UTC

Urgent Maintenance on Chicago, New York, Dallas, Atlanta, Washington datacenters - zscaler.net

Wed, 10 Jun 2026 20:19:53 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Chicago, New York, Dallas, Atlanta, Washington datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 09:00 PM Pacific Time on June 11, 2026 (Friday, June 12, 2026 4:00 AM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 12 Jun 2026 06:41:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on London, Frankfurt, Manchester, Amsterdam, Zurich datacenters - zscaler.net

Wed, 10 Jun 2026 20:16:18 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the London, Frankfurt, Manchester, Amsterdam, Zurich datacenters on the zscaler.net cloud. This maintenance is scheduled for Thursday at 01:00 PM Pacific Time on June 11, 2026 (Thursday, June 11, 2026 08:00 PM UTC), and can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Latest Update - Thu, 11 Jun 2026 23:55:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 11 Jun 2026 22:33:29 UTC

Zscaler Site Reliability Engineering team will be extending this trust by 2 hours. We will provide an update once the maintenance is completed.

Update - Thu, 11 Jun 2026 23:55:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Maintenance Window Updates - zscalerthree.net

Tue, 09 Jun 2026 19:51:21 GMT

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Time(in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
All Regions		1:00 AM - 3:00 AM	1:00 AM - 3:00 AM	1:00 AM - 3:00 AM			1:00 AM - 6:00 AM
Oceania	10:00 AM - 1:00 PM
Asia Pacific	4:00 PM - 7:00 PM
EMEA	10:00 PM - 1:00 AM
AMER	5:00 AM - 8:00 AM

Update - Wed, 08 Jul 2026 16:31:41 UTC

New schedule is in place starting July 1, 2026. Please contact Zscaler Support if you have additional questions.

Maintenance Window Updates - zscloud.net

Tue, 09 Jun 2026 19:48:06 GMT

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Time(in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
All Regions		1:00 AM - 3:00 AM	1:00 AM - 3:00 AM	1:00 AM - 3:00 AM			1:00 AM - 6:00 AM
Oceania	10:00 AM - 1:00 PM
Asia Pacific	4:00 PM - 7:00 PM
EMEA	10:00 PM - 1:00 AM
AMER	5:00 AM - 8:00 AM

Update - Wed, 08 Jul 2026 16:29:43 UTC

New schedule is in place starting July 1, 2026. Please contact Zscaler Support if you have additional questions.

Maintenance Window Updates - zscalertwo.net

Tue, 09 Jun 2026 19:40:06 GMT

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Time(in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
All Regions		1:00 AM - 3:00 AM	1:00 AM - 3:00 AM	1:00 AM - 3:00 AM		1:00 AM - 6:00 AM
Oceania	10:00 AM - 1:00 PM
Asia Pacific	4:00 PM - 7:00 PM
EMEA	10:00 PM - 1:00 AM
AMER	5:00 AM - 8:00 AM

Update - Wed, 08 Jul 2026 16:33:50 UTC

New schedule is in place starting July 1, 2026. Please contact Zscaler Support if you have additional questions.

Maintenance Window Updates - zscaler.net

Tue, 09 Jun 2026 19:31:30 GMT

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Time(in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT	SUN
All Regions		1:00 AM - 3:00 AM	1:00 AM - 3:00 AM	1:00 AM - 3:00 AM		1:00 AM - 6:00 AM
Oceania	10:00 AM - 1:00 PM
Asia Pacific	4:00 PM - 7:00 PM
EMEA	10:00 PM - 1:00 AM
AMER	5:00 AM - 8:00 AM

Update - Wed, 08 Jul 2026 16:27:03 UTC

New schedule is in place starting July 1, 2026. Please contact Zscaler Support if you have additional questions.

Maintenance Window Updates - zscalerone.net

Tue, 09 Jun 2026 19:23:39 GMT

The new maintenance window schedules will be effective starting July 1st, 2026. Service updates for all regions will be recurring.

Time (in UTC- Coordinated Universal Time)
REGION	MON	TUES	WED	THU	FRI	SAT
All Regions		1:00 AM - 3:00 AM	1:00 AM - 3:00 AM	1:00 AM - 3:00 AM	7:00 AM - 11:00 AM	1:00 PM - 4:00 PM
All Regions					11:00 PM - 3:00 AM
Oceania	10:00 AM - 1:00 PM
Asia Pacific	4:00 PM - 7:00 PM
EMEA	10:00 PM - 1:00 AM
AMER	5:00 AM - 8:00 AM

Update - Wed, 08 Jul 2026 16:23:43 UTC

New schedule is in place starting July 1, 2026. Please contact Zscaler Support if you have additional questions.

Singapore V (SIN5) Datacenter Network Maintenance - zscalertwo.net

Tue, 09 Jun 2026 13:19:14 GMT

Zscaler will be performing hardware maintenance in Singapore V (SIN5) Datacenter.

Scheduled Maintenance window,
Start: 2026-06-12 12:00 UTC
End: 2026-06-12 15:00 UTC
(Local Time 2026-06-12 20:00 - 2026-06-12 23:00 GMT+8)

Update - Fri, 12 Jun 2026 13:54:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zurich I (ZRH1) Datacenter Network Maintenance - zdxcloud.net

Mon, 08 Jun 2026 15:47:10 GMT

Zscaler will be performing hardware maintenance in the Zurich I (ZRH1) Datacenter.

Maintenance window,
Start: 2026-06-10 18:00 CEST
End: 2026-06-10 22:00 CEST
(i.e. 2026-06-10 16:00 - 20:00 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.

[UPDATE: Extending trust an additional two hours]

Update - Wed, 10 Jun 2026 18:43:03 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on San Francisco IV datacenter - zscloud.net, zscalerthree.net

Sat, 06 Jun 2026 05:13:12 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the San Francisco IV datacenter on the zscloud.net and zscalerthree.net clouds. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Sat, 06 Jun 2026 08:11:21 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance of Logging Clusters - zscalerthree.net

Sat, 06 Jun 2026 04:32:37 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on our logging clusters. This maintenance is scheduled for Friday, June 05, 2026, at 9:45 PM Pacific Time and may take up to 3 hours to complete.

During maintenance, audit log viewing and downloads via the ZIA, ZDX, and ZTW administration UI or API will be unavailable. However, all logs collected during this period will be available after the maintenance ends.

Latest Update - Sat, 06 Jun 2026 11:39:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 06 Jun 2026 07:56:32 UTC

This maintenance is extended by 4 hours.Please contact Zscaler Support if you have additional questions.

Update - Sat, 06 Jun 2026 11:39:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Data Fabric - Delay in Data Delivery - zscaler.net, zscalerone.net, zscloud.net, zscalerthree.net

Fri, 05 Jun 2026 20:02:06 GMT

Zscaler has identified an issue affecting Data Fabric. Web Log and Firewall transaction data delivery to Breach Predictor and Red Canary is delayed. Other logging and data collection services remain operational.

Zscaler teams are actively working to restore normal data processing and will provide updates as progress is made. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The preliminary root cause was identified as a backend service update that inadvertently disrupted the log generation and delivery infrastructure

Latest Update - Sat, 06 Jun 2026 11:41:58 UTC

Zscaler has successfully deployed the fix across all clouds, and the issue is now resolved.

Update - Fri, 05 Jun 2026 23:25:01 UTC

Zscaler has identified the cause of the issue and is implementing corrective actions in a phased manner to restore normal service. Further updates will be shared as they become available.

Update - Sat, 06 Jun 2026 11:41:58 UTC

Zscaler has successfully deployed the fix across all clouds, and the issue is now resolved.

Hyderabad I (ZSN), Chennai II (ZSN), New Delhi I (ZSN) and Mumbai VI (ZS3) Data center Issue - zscaler.net, zscalerthree.net

Fri, 05 Jun 2026 14:28:36 GMT

Zscaler has detected an issue with our Hyderabad I (ZSN), Chennai II (ZSN), New Delhi I (ZSN) and Mumbai VI (ZS3) Data center and is currently investigating the matter. Customers may encounter disconnections, periods of slowness or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A software defect contributed to resource utilization issues within a subset of service components, resulting in intermittent performance degradation for customers in the affected data centers.

Latest Update - Mon, 15 Jun 2026 22:09:29 UTC

Service health and platform performance have remained stable following the corrective actions implemented by Zscaler. Based on sustained stability across the affected service components, this incident has been resolved. Our systems remain fully operational, and we will continue to monitor the environment to ensure ongoing stability.

Update - Fri, 05 Jun 2026 15:19:22 UTC

Update - Fri, 05 Jun 2026 18:47:27 UTC

Zscaler teams are actively working to identify the cause and apply mitigation as needed. We will provide additional updates as soon as more information becomes available

Update - Fri, 05 Jun 2026 23:09:55 UTC

Zscaler has identified conditions contributing to this issue and continues to investigate to validate findings and determine any additional contributing factors. Current monitoring indicates that the behavior remains intermittent in nature. Zscaler teams continue to assess the identified conditions and evaluate corrective actions as needed. We will continue to provide updates as more information becomes available.

Update - Mon, 08 Jun 2026 12:12:13 UTC

Update - Mon, 08 Jun 2026 13:46:58 UTC

The incident title and the impacted data center and cloud details have been updated to include the Mumbai VI data center on zscalerthree.net as well. Zscaler is treating this issue with high priority and is actively working to isolate the problem and identify the root cause. We appreciate your patience and understanding while the investigation is ongoing. Additional updates will be provided as more information becomes available.

Update - Mon, 08 Jun 2026 21:17:39 UTC

Zscaler has identified a software defect that may be contributing to the observed behavior and is currently validating a corrective update. As part of this validation effort, a limited deployment is being planned while teams continue to monitor service health and assess impact. We will provide additional updates as more information becomes available.

Update - Tue, 09 Jun 2026 06:32:06 UTC

Zscaler has scheduled an initial limited deployment of the corrective software update for late Tuesday (UTC). Following successful validation of this initial rollout, we plan to extend the deployment to additional affected infrastructure starting Thursday and continuing through the weekend. Zscaler remains actively engaged in monitoring service health, and we will provide further updates as deployment activities progress.

Update - Wed, 10 Jun 2026 00:02:13 UTC

Zscaler has successfully completed the initial limited deployment of the corrective software update intended to address the observed service instability. The update is currently undergoing validation within a targeted subset of the affected service components, and Zscaler is closely monitoring service health and system performance to assess its effectiveness. Pending successful validation, deployment of the update to the remaining affected service components will proceed in phases. We will continue to provide updates as validation and deployment activities progress.

Update - Wed, 10 Jun 2026 07:23:33 UTC

Zscaler has concluded the validation phase for the recent software update deployment. During this period, monitoring indicated that the update did not meet our performance and stability standards. To prioritize service health, our teams are currently rolling back the update from the targeted components. In parallel, Zscaler has taken additional steps to temporarily mitigate the impact across the affected infrastructure, and we are closely monitoring the environment for stability. Zscaler is also actively analyzing diagnostic data gathered during the validation phase to refine the software fix. If you continue to experience slowness, please contact Zscaler Support. We will provide further updates as our investigation and mitigation efforts progress.

Update - Wed, 10 Jun 2026 23:23:40 UTC

Following additional analysis and refinement efforts, Zscaler has deployed an updated software build to a limited subset of the affected service components as part of a controlled validation process. Initial observations following deployment are encouraging, and Zscaler is continuing to closely monitor service health and system performance. Validation activities remain ongoing, including observation during regional business hours to ensure stability under increased traffic volumes. We will continue to provide updates as validation progresses and additional information becomes available.

Update - Thu, 11 Jun 2026 03:00:20 UTC

Zscaler has observed promising results from the initial validation of the updated software build, with targeted components demonstrating improved stability. Based on these positive indicators, we have expanded the deployment to an additional subset of the affected infrastructure for further validation. Our teams are currently allowing the update to soak while closely monitoring service health to ensure continued stability under varied traffic conditions. Pending successful completion of this extended validation period, we will determine a timeline for deployment across the remaining impacted infrastructure. We will continue to provide updates as deployment activities progress.

Update - Thu, 11 Jun 2026 06:33:07 UTC

The recently deployed software update continues to demonstrate positive results during its expanded validation phase. Service health and system memory usage remain stable compared to the previous day. Zscaler continues to closely monitor the environment under varying production traffic loads. Zscaler will continue to provide periodic updates as data center monitoring and validation activities progress, and as subsequent deployment decisions are made.

Update - Thu, 11 Jun 2026 20:58:57 UTC

Zscaler has completed the validation review of the updated software build, and the results continue to be positive. Service health and platform stability have remained consistent throughout the observation period, with no significant resource utilization concerns identified. Based on the successful validation results, Zscaler has initiated phased deployment of the software update across the remaining affected service components within the impacted data centers. Zscaler will continue to closely monitor service health and platform performance throughout the deployment process and will provide additional updates as rollout activities progress.

Update - Thu, 11 Jun 2026 23:27:14 UTC

Zscaler has completed deployment of the updated software build across the affected service components within the impacted data centers. Zscaler is continuing to closely monitor service health and platform performance to validate ongoing stability under production traffic conditions, including periods of higher utilization. We will continue to provide updates as monitoring and validation activities progress.

Update - Fri, 12 Jun 2026 13:16:08 UTC

Post-deployment monitoring of New Delhi I (Zscaler.net) and Mumbai VI (Zscalerthree.net) data centers has shown positive results, with services remaining stable and performing as expected throughout the observation period. As part of our continued investigation, we identified similar conditions impacting a limited set of service edges on MAA2 and HYD data centers in the Zscaler.net and Zscalerthree.net clouds. As a mitigation action, we have deployed the fix to a limited portion of the affected infrastructure in HYD1 and MAA2 for monitoring. Early monitoring is showing positive results as a result we will proceed with the broader rollout in a controlled manner. We will share the plan for full deployment on these data centers in the 4 hours

Update - Fri, 12 Jun 2026 16:46:15 UTC

Zscaler has initiated deployment of the software update across the remaining affected service components on MAA2 and HYD data centers in the Zscaler.net and Zscalerthree.net clouds.

Update - Fri, 12 Jun 2026 22:23:40 UTC

Following the previously communicated deployment activities, Zscaler has successfully expanded deployment of the software update to additional India data centers within the zscaler.net and zscalerthree.net clouds. Post-deployment observations continue to be positive, with service health remaining stable and no significant resource utilization concerns observed following the rollout. Zscaler will continue enhanced monitoring to validate sustained service stability and platform performance across varying traffic patterns and utilization levels. Additional updates will be provided as monitoring activities progress.

Update - Mon, 15 Jun 2026 22:09:29 UTC

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 05 Jun 2026 08:31:01 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Partner Admin UI will not be available. This maintenance can take up to 30 minutes to complete. All the logs that are collected during this period will be available after the maintenance ends.

Update - Fri, 05 Jun 2026 08:47:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on San Francisco IV datacenter - zscaler.net

Fri, 05 Jun 2026 07:52:41 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the San Francisco IV datacenter on the zscaler.net cloud. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 05 Jun 2026 10:36:12 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 05 Jun 2026 06:35:34 GMT

Zscaler will be performing an urgent maintenance on websites https://sitereview.zscaler.com/ and http://filecheck.zscaler.com/ . This maintenance is scheduled for Thursday at 11:45 PM Pacific Time on June 4, 2026 (Friday, June 5, 2026 06:45 AM UTC), and can take up to 2 hours to complete.For more information, please check our FAQ. If you need further assistance, contact Zscaler Support with reference to this incident. Status changes will be updated here when available.

Update - Fri, 05 Jun 2026 07:35:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Lagos III (LOS3) Datacenter Urgent Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Fri, 05 Jun 2026 02:12:29 GMT

Zscaler will be performing urgent hardware maintenance in the Lagos III (LOS3) Datacenter.

Maintenance window,
Start: 2026-06-05 04:00 WAT
End: 2026-06-05 08:00 WAT
(i.e. 2026-06-05 03:00 - 07:00 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.

Update - Fri, 05 Jun 2026 04:08:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London V (LON5) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net

Thu, 04 Jun 2026 21:24:25 GMT

Zscaler will be performing hardware maintenance in the London V (LON5) Datacenter.

Maintenance window,
Start: 2026-06-09 21:00 BST
End: 2026-06-10 01:30 BST
(i.e. 2026-06-09 20:00 - 2026-06-10 00:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

[UPDATE: Extending trust an additional two hours due to resource conflict]

Update - Tue, 09 Jun 2026 23:31:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

CASB - SaaS Security API Integration Issue for OpenAI (ChatGPT) - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 04 Jun 2026 20:54:44 GMT

Zscaler has identified and is investigating an issue affecting CASB SaaS Security scanning for OpenAI (ChatGPT). Customers may experience delays in security scan results and related incident reporting for OpenAI content.

Zscaler teams are actively investigating the issue and working to restore services. We will provide additional updates as more information becomes available. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A service compatibility issue within the CASB SaaS Security integration for OpenAI (ChatGPT) affected security scanning and incident reporting.

Latest Update - Fri, 05 Jun 2026 20:58:39 UTC

Zscaler has resolved the issue affecting CASB SaaS Security scanning for OpenAI (ChatGPT). The issue was caused by a service compatibility issue affecting the CASB SaaS Security integration for OpenAI (ChatGPT). Corrective changes have been implemented, and service has been restored.

Update - Thu, 04 Jun 2026 23:58:42 UTC

Zscaler has identified the cause of the issue affecting CASB SaaS Security scanning for OpenAI (ChatGPT). A fix has been developed and validated. Deployment of the fix is being performed in a phased manner during regional off-peak hours to minimize potential impact. We will continue to monitor the deployment and provide updates as progress is made or if additional information becomes available.

Update - Fri, 05 Jun 2026 20:58:39 UTC

Urgent Maintenance - zscalerone.net

Thu, 04 Jun 2026 20:23:56 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 12:00 AM Pacific Time on June 5, 2026 (Friday, June 5, 2026 07:00 AM UTC), and can take up to 4 hours to complete.

Update - Fri, 05 Jun 2026 08:38:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Boston I datacenter - zscalertwo.net

Thu, 04 Jun 2026 09:18:43 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the Boston I datacenter on the zscalertwo.net cloud. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Thu, 04 Jun 2026 10:06:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Scheduled Maintenance - zdxcloud.net

Wed, 03 Jun 2026 21:28:52 GMT

The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Thursday at 06:00 AM UTC on 04 June, 2026, and can take up to 2 hours to complete. During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

Latest Update - Thu, 04 Jun 2026 09:51:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 04 Jun 2026 07:24:24 UTC

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zdxcloud.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 04 Jun 2026 09:51:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester I (MAN1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net

Wed, 03 Jun 2026 19:59:28 GMT

Zscaler will be performing hardware maintenance in the Manchester I (MAN1) Datacenter.

Maintenance window,
Start: 2026-06-05 21:00 BST
End: 2026-06-05 23:30 BST
(i.e. 2026-06-05 20:00 - 22:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 05 Jun 2026 21:26:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Frankfurt VI Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net, zscloud.net

Wed, 03 Jun 2026 18:10:34 GMT

Zscaler will be enabling IPv6 at our Frankfurt VI (FRA6) Data Center. During the maintenance window the services through FRA6 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 4, 11:00 am PDT (June 4, 18:00 UTC)

End time is June 4, 4:00 pm PDT (June 4, 23:00 UTC)

Update - Thu, 04 Jun 2026 23:26:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hyderabad I (HYD1) Urgent Datacenter Network Maintenance - zscaler.net, zscloud.net

Wed, 03 Jun 2026 17:56:52 GMT

Zscaler will be performing urgent hardware maintenance in the Hyderabad I (HYD1) Datacenter.

Maintenance window,
Start: 2026-06-05 22:30 IST
End: 2026-06-06 02:30 IST
(i.e. 2026-06-05 17:00 - 21:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 05 Jun 2026 18:33:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hyderabad I (HYD1) Urgent Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, private.zscaler.com, zpatwo.net

Wed, 03 Jun 2026 17:54:30 GMT

Zscaler will be performing urgent hardware maintenance in the Hyderabad I (HYD1) Datacenter.

Maintenance window,
Start: 2026-06-04 20:30 IST
End: 2026-06-05 00:30 IST
(i.e. 2026-06-04 15:00 - 19:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 04 Jun 2026 18:28:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Madrid III (MAD3) Datacenter Network Maintenance - zscalertwo.net

Wed, 03 Jun 2026 06:42:53 GMT

Zscaler will be performing hardware maintenance in the Madrid III (MAD3) Datacenter.

Maintenance window,
Start: 2026-06-05 03:00 CEST
End: 2026-06-05 06:00 CEST
(i.e. 2025-06-05 01:00 - 04:00 UTC)

Update - Fri, 05 Jun 2026 03:37:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.zsdpc.net

Wed, 03 Jun 2026 04:24:12 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on June 3rd, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Wed, 03 Jun 2026 05:50:24 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Frankfurt VI Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net, zscalerthree.net

Tue, 02 Jun 2026 20:53:21 GMT

Zscaler will be enabling IPv6 at our Frankfurt VI (FRA6) Data Center. During the maintenance window the services through FRA6 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 4, 9:00 am PDT (June 4, 16:00 UTC)

End time is June 4, 2:00 pm PDT (June 4, 21:00 UTC)

Issue Affecting User-Based Filtering in ZIA Admin UI and Experience Center - zscalertwo.net

Tue, 02 Jun 2026 20:17:32 GMT

Zscaler is aware of and investigating an issue affecting user-based filtering across portions of the ZIA Admin UI and Experience Center. Customers may be unable to search for, locate, or select specific users when applying user filters, which may impact user-specific analysis and administrative workflows.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A recent configuration change on the zscalertwo.net cloud triggered an underlying software defect that affected user-based filtering functionality.

Latest Update - Tue, 02 Jun 2026 21:41:47 UTC

Update - Tue, 02 Jun 2026 20:31:59 UTC

Zscaler has implemented a mitigation for the issue. Initial validation indicates that affected functionality has been restored. We are continuing to monitor the service and gather customer feedback to confirm that the issue has been fully resolved.

Update - Tue, 02 Jun 2026 21:41:47 UTC

San Francisco IV (SJC4) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 02 Jun 2026 06:37:34 GMT

Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.

Maintenance window:
Start: 2026-06-04 02:00 UTC
End: 2026-06-04 05:00 UTC
(Local Time 2026-06-03 19:00 - 2026-06-03 22:00)

Update - Thu, 04 Jun 2026 04:08:08 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on San Francisco IV datacenter - zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 02 Jun 2026 05:56:02 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the San Francisco IV datacenter on the zscalerthree.net, zscalertwo.net, zscloud.net clouds. This maintenance can take up to 4 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Tue, 02 Jun 2026 08:44:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net

Tue, 02 Jun 2026 00:23:36 GMT

Zscaler will be enabling IPv6 at our London III (LON3) Data Center. During the maintenance window the services through LON3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 3, 3:00 pm PDT (June 3, 22:00 UTC)

End time is June 3, 8:00 pm PDT (June 4, 3:00 UTC)

Update 6/2: Maintenance window time change

Update - Thu, 04 Jun 2026 03:21:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming New Data Centers and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 02 Jun 2026 00:24:44 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on June 1, 2026, we would like to notify you of the upcoming new data centers and expansions at the locations listed below. These would be available anytime on or after July 31, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Buenos Aires II	137.31.102.0/23	New RS* data center
Americas	Buenos Aires II	137.31.104.0/23	New RS* data center
Americas	Buenos Aires II	137.31.106.0/23	New RS* data center
Americas	Buenos Aires II	137.31.108.0/23	New RS* data center
Americas	Buenos Aires II	137.31.110.0/23	New RS* data center
Americas	Buenos Aires II	2605:4300:e800::/40	New RS* data center
APAC	Canberra I	175.107.180.0/23	Expansion of existing data center
APAC	Canberra I	175.107.182.0/23	Expansion of existing data center
EMEA	Dusseldorf I	137.31.94.0/23	Expansion of existing data center

*RS - Regional Surcharge (An additional subscription is required to use this data center.)

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Addition to Zscaler Hub IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Tue, 02 Jun 2026 00:17:26 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on June 1, 2026, we would like to notify you of the changes to the Zscaler Hub IP Addresses as listed below. These will be effective anytime on or after July 31, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

CIDR	Notes
175.107.184.0/23	New addition to Required Hub IP addresses

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Frankfurt VI Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Tue, 02 Jun 2026 00:11:05 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Frankfurt VI (FRA6) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 18, 9:00 am PDT (June 18, 16:00 UTC)

End time is June 18, 2:00 pm PDT (June 18, 21:00 UTC)

Update 6/12/26: Rescheduled Maintenance

Update - Thu, 18 Jun 2026 20:06:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo V Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Mon, 01 Jun 2026 23:54:49 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Tokyo V (TYO5) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Start time is June 5, 7:00 am PDT (June 5, 14:00 UTC)

End time is June 5, 2:00 pm PDT (June 5, 21:00 UTC)

Update - Fri, 05 Jun 2026 20:41:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo V Datacenter Scheduled Maintenance - IPv6 Enablement - zscalerthree.net

Mon, 01 Jun 2026 23:45:03 GMT

Zscaler will be enabling IPv6 at our Tokyo V (TYO5) Data Center. During the maintenance window the services through TYO5 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 5, 7:00 am PDT (June 5, 14:00 UTC)

End time is June 5, 2:00 pm PDT (June 5, 21:00 UTC)

Chicago II Datacenter Scheduled Maintenance - IPv6 Enablement - zscloud.net

Mon, 01 Jun 2026 23:25:18 GMT

Zscaler will be enabling IPv6 at our Chicago II (CHI2) Data Center. During the maintenance window the services through CHI2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 4, 6:00 pm PDT (June 5, 1:00 UTC)

End time is June 4, 11:00 pm PDT (June 5, 6:00 UTC)

Update - Fri, 05 Jun 2026 03:38:14 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dusseldorf I Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net, zscloud.net

Mon, 01 Jun 2026 20:22:38 GMT

Zscaler will be enabling IPv6 at our Dusseldorf I (DUS1) Data Center. During the maintenance window the services through DUS1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 3, 9:00 am PDT (June 3, 16:00 UTC)

End time is June 3, 2:00 pm PDT (June 3, 21:00 UTC)

Update - Wed, 03 Jun 2026 20:24:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London III Datacenter Scheduled Maintenance - IPv6 Enablement - zscloud.net

Mon, 01 Jun 2026 20:08:03 GMT

Zscaler will be enabling IPv6 at our London III (LON3) Data Center. During the maintenance window the services through LON3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 2, 2:00 pm PDT (June 2, 21:00 UTC)

End time is June 2, 10:00 pm PDT (June 3, 5:00 UTC)

Update 6/1: Corrected UTC time
Update 6/2: Time window adjusted
Update 6/2: Maintenance Extended

Update - Wed, 03 Jun 2026 05:05:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester II Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Mon, 01 Jun 2026 18:41:36 GMT

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 2, 2:00 pm PDT (June 2, 21:00 UTC)

End time is June 2, 7:00 pm PDT (June 3, 2:00 UTC)

Hong Kong III (HKG3) Datacenter Network Maintenance - zscalertwo.net

Mon, 01 Jun 2026 17:53:01 GMT

Zscaler will be performing hardware maintenance in the Hong Kong III (HKG3) Datacenter.

Maintenance window,
Start: 2026-06-03 19:00 HKT
End: 2026-06-03 21:00 HKT
(i.e. 2026-06-03 11:00 - 13:00 UTC)

[Update] Trust is extended till 22:00HKT due to unforeseen issues with DC logistics.

Update - Wed, 03 Jun 2026 13:34:33 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta II (ATL2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Mon, 01 Jun 2026 17:40:03 GMT

Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.

Maintenance window,
Start: 2026-06-03 03:00 EDT
End: 2026-06-03 07:00 EDT
(i.e. 2026-06-03 07:00 - 11:00 UTC)

Update - Wed, 03 Jun 2026 10:53:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zscaler Client Connector-Based End User Notifications Issue - zscalerthree.net

Mon, 01 Jun 2026 16:33:58 GMT

Zscaler has detected an issue with Zscaler Client Connector-Based End User Notifications on its zscalerthree.net Cloud.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue was caused by an underlying infrastructure resource constraint.

Latest Update - Mon, 01 Jun 2026 18:08:47 UTC

Update - Mon, 01 Jun 2026 16:58:38 UTC

We have identified the root cause of the issue and working on resolution.

Update - Mon, 01 Jun 2026 17:23:44 UTC

Zscaler has implemented mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Mon, 01 Jun 2026 18:08:47 UTC

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.eu.zsdpc.net

Mon, 01 Jun 2026 05:18:14 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on June 1st, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Wed, 01 Jun 2026 11:45:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net

Sat, 30 May 2026 00:20:42 GMT

Zscaler will be enabling IPv6 at our Chicago I (CHI1) Data Center. During the maintenance window the services through CHI1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 1, 6:00 pm PDT (June 2, 1:00 UTC)

End time is June 1, 11:00 pm PDT (June 2, 6:00 UTC)

Update - Tue, 02 Jun 2026 08:19:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London V Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Sat, 30 May 2026 00:04:35 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our London V (LON5) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is June 1, 1:00 pm PDT (June 1, 20:00 UTC)

End time is June 1, 6:00 pm PDT (June 2, 1:00 UTC)

Update - Tue, 02 Jun 2026 01:04:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - Privileged Remote Access - zpatwo.net

Fri, 29 May 2026 18:09:38 GMT

Zscaler will be performing an urgent maintenance on the private.zscaler.com cloud on Friday, May 29, 2026, starting at 06:15 PM UTC. During this maintenance window, Privileged Remote Access (PRA) sessions may be briefly disrupted. If a session disconnects, users will need to manually reconnect.

Update - Sun, 31 May 2026 14:48:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Vienna I (VIE1) Datacenter Network Maintenance - zscalertwo.net

Fri, 29 May 2026 17:56:33 GMT

Zscaler will be performing hardware maintenance in the Vienna I (VIE1) Datacenter.

Maintenance window,
Start: 2026-06-03 21:30 CEST
End: 2026-06-03 23:30 CEST
(i.e. 2026-06-03 19:30 - 21:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Wed, 03 Jun 2026 21:02:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZIdentity Service Upgrade - zslogin.net

Fri, 29 May 2026 18:26:16 GMT

Zscaler will perform planned maintenance for the ZIdentity (ZID) service between 07:00 UTC and 11:00 UTC on Saturday, May 30, 2026. This maintenance includes feature enhancements and bug fixes designed to improve platform reliability and performance.

If you experience any access issues after the maintenance window has concluded, please contact Zscaler Support for assistance.

Update - Sat, 30 May 2026 18:08:41 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - Privileged Remote Access - private.zscaler.com

Fri, 29 May 2026 07:49:29 GMT

Zscaler will be performing an urgent maintenance on the private.zscaler.com cloud on Friday, May 29, 2026, starting at 07:45 AM UTC. During this maintenance window, Privileged Remote Access (PRA) sessions may be briefly disrupted. If a session disconnects, users will need to manually reconnect.

Update - Fri, 29 May 2026 09:44:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Planned Maintenance Activity for ZPA platform service - private.zscaler.com

Fri, 29 May 2026 06:03:42 GMT

We will be performing planned maintenance on our platform infrastructure in the Prod EMEA region to enhance availability and resiliency. Some customers may witness below impact during this maintenance window:

Momentary disconnect and auto-reconnect of zcc.
Any active session will be disconnected and logged under ZPA User Activity logs as “MT_CLOSED_TLS_CONN_GONE_SCIM_USER_MOVED”

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Update - Sun, 31 May 2026 03:23:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester II (MAN2) Datacenter Network Maintenance - zscalertwo.net

Thu, 28 May 2026 18:18:59 GMT

Zscaler will be performing hardware maintenance in the Manchester II (MAN2) Datacenter.

Maintenance window,
Start: 2026-05-29 21:00 BST
End: 2026-05-29 23:00 BST
(i.e. 2026-05-29 20:00 - 22:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 29 May 2026 21:45:59 UTC Maintenance Completed

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Taipei II Datacenter Scheduled Maintenance - Extranet Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 28 May 2026 01:16:54 GMT

Zscaler will be performing scheduled maintenance in Taipei II (TPE2) to enable Zscaler Extranet Application Support. We expect minimal to no impact to services during the maintenance window.

Other Zscaler sites and services will continue to operate normally.

For more information, please visit:

Maintenance Window:

Start time is May 29, 10:00 am PDT (May 29, 17:00 UTC)

End time is May 29, 12:00 pm PDT (May 29, 19:00 UTC)

Update - Fri, 29 May 2026 23:10:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Experience Center Page Load Failures - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net

Wed, 27 May 2026 23:07:04 GMT

A subset of users accessing Experience Center may have experienced intermittent 401 Unauthorized errors impacting Experience Center pages, actions, and certain Experience Center driven automations. In some cases, users may have observed failed page loads or authentication-related retries.

Zscaler identified the issue within infrastructure supporting authentication and session validation services in the US West region. Mitigation actions were completed by redirecting traffic to an alternate region, after which service stability was restored. Monitoring remains in place to ensure ongoing service stability.

For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue was caused by an underlying infrastructure degradation affecting regional authentication and session validation services for the Experience Center.

Update - Thu, 28 May 2026 02:51:05 UTC

Zscaler has successfully resolved the issue affecting the Experience Center. The underlying infrastructure problem has been fixed, and standard operations have fully resumed following comprehensive testing.

ZDX Zoom Call Quality Monitoring Issue - zdxcloud.net

Tue, 26 May 2026 23:52:05 GMT

Zscaler has identified an issue impacting Zoom Call Quality Monitoring (CQM) within ZDX, where Zoom webhook data is not currently being received as expected. As a result, Zoom call quality metrics may appear delayed, stale, or unavailable in the ZDX portal. Zscaler is actively investigating the issue and working to restore normal data processing.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A configuration mismatch affecting Zoom webhook processing resulted in a temporary interruption of Zoom call quality data ingestion into the ZDX platform.

Latest Update - Fri, 29 May 2026 19:29:07 UTC

Update - Wed, 27 May 2026 00:22:23 UTC

Zscaler continues to actively investigate the issue and work to restore normal Zoom call quality data availability within the ZDX portal. Further updates will be provided as they become available.

Update - Wed, 27 May 2026 04:06:18 UTC

Update - Wed, 27 May 2026 09:29:51 UTC

We have identified the root cause for this issue and we are currently working to mitigate the issue.

Update - Wed, 27 May 2026 13:41:34 UTC

Zscaler is prioritizing the issue and is actively working to mitigate. We appreciate your patience and understanding during this investigation. Additional updates will be provided as more information becomes available.

Update - Wed, 27 May 2026 19:56:53 UTC

Zscaler has identified the preliminary cause and the impacting component associated with this issue. Teams are actively validating the resolution path and working to restore normal Zoom call quality data availability within the ZDX portal. Additional updates will be provided as they become available.

Update - Wed, 27 May 2026 21:13:27 UTC

Zscaler has successfully implemented a fix for the issue impacting Zoom Call Quality Monitoring (CQM) within ZDX. Validation has confirmed that Zoom call quality data is now processing and available within the ZDX portal, and service has been restored. Monitoring remains in place to ensure continued stability.

Update - Thu, 28 May 2026 04:25:06 UTC

The issue has recurred and Zscaler is actively investigating the problem. Updates will be shared as available.

Update - Thu, 28 May 2026 06:20:22 UTC

Zscaler has confirmed that our systems remain healthy, and Zoom has escalated the issue to their engineering team for further investigation. We will provide another update as more information becomes available.

Update - Thu, 28 May 2026 15:49:35 UTC

We continue to collaborate with Zoom on further investigation and will provide another update as more information becomes available.

Update - Thu, 28 May 2026 15:59:43 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Fri, 29 May 2026 19:29:07 UTC

Canberra I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 26 May 2026 18:39:36 GMT

Zscaler will be enabling IPv6 at our Canberra I (CBR1) Data Center. During the maintenance window the services through CBR1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 12, 7:00 am PDT (June 12, 14:00 UTC)

End time is June 12, 2:00 pm PDT (June 12, 21:00 UTC)

Update 6/8: Rescheduled

Update - Fri, 12 Jun 2026 23:07:40 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago II Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Tue, 26 May 2026 18:24:25 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chicago II (CHI2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is May 28, 6:00 pm PDT (May 29, 1:00 UTC)

End time is May 28, 11:00 pm PDT (May 29, 6:00 UTC)

Update - Fri, 29 May 2026 05:51:17 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Warsaw II Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net, zscalerthree.net

Tue, 26 May 2026 18:17:08 GMT

Zscaler will be enabling IPv6 at our Warsaw II (WAW2) Data Center. During the maintenance window the services through WAW2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is May 28, 9:00 am PDT (May 28, 16:00 UTC)

End time is May 28, 3:00 pm PDT (May 28, 22:00 UTC)

Update - Thu, 28 May 2026 22:15:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hong Kong III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscloud.net

Tue, 26 May 2026 18:09:22 GMT

Zscaler will be enabling IPv6 at our Hong Kong III (HKG3) Data Center. During the maintenance window the services through HKG3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is June 23, 9:00 am PDT (June 23, 16:00 UTC)

End time is June 23, 4:00 pm PDT (June 23, 23:00 UTC)

Update 6/18: Maintenance Rescheduled

Update - Tue, 23 Jun 2026 20:46:47 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Seattle I Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Tue, 26 May 2026 17:59:43 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Seattle I (SEA1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is May 27, 6:00 pm PDT (May 28, 1:00 UTC)

End time is May 27, 11:00 pm PDT (May 28, 6:00 UTC)

Update - Thu, 28 May 2026 16:14:06 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New York IV (NYC4) Datacenter Network Maintenance - zscalertwo.net

Tue, 26 May 2026 16:34:50 GMT

Zscaler will be performing hardware maintenance in the New York IV (NYC4) Datacenter.

Maintenance window,
Start: 2026-05-28 19:00 EST
End: 2026-05-28 21:00 EST
(i.e. 2026-05-28 23:00 - 2026-05-29 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

[UPDATED: Corrected UTC Time]

Update - Fri, 29 May 2026 00:36:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Brussels (BRU2) Critical Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 26 May 2026 16:27:11 GMT

Zscaler will be performing critical hardware maintenance in the Brussels II (BRU2) Datacenter.

Maintenance window,
Start: 2026-05-28 22:00 CEST
End: 2026-05-29 03:00 CEST
(i.e. 2026-05-28 20:00 - 2026-05-29 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 28 May 2026 23:19:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai III Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Tue, 26 May 2026 03:15:14 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chennai III (MAA3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is May 31, 8:00 am PDT (May 31, 15:00 UTC)

End time is May 31, 1:00 pm PDT (May 31, 20:00 UTC)

Update 5/27: Maintenance Postponed
Update 5/29: Maintenance scheduled

Update - Sun, 31 May 2026 20:02:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZIdentity Portal Issue - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.eu.zsdpc.net, zslogin.net

Sun, 24 May 2026 06:01:14 GMT

Zscaler is investigating an issue with ZIdentity Portal on our zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net Cloud. Status changes will be updated here as they become available.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: A configuration issue in the affected EU environment impacted administrator login flows through the z-identity service.

Latest Update - Sun, 24 May 2026 06:43:04 UTC

Zscaler identified the issue and implemented the necessary remediation. Based on customer feedback and internal testing, the issue has been resolved.

Update - Sun, 24 May 2026 06:12:22 UTC

Zscaler is actively investigating the issue. We have updated the scope of impact to accurately reflect the current situation, and will share further updates as they become available.

Update - Sun, 24 May 2026 06:43:04 UTC

Zscaler identified the issue and implemented the necessary remediation. Based on customer feedback and internal testing, the issue has been resolved.

Scheduled Maintenance Extended - zscloud.net

Sat, 23 May 2026 17:05:01 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud (Asia Pacific Region) by 4 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 23 May 2026 20:40:15 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - EMEA Region - zscalertwo.net

Fri, 22 May 2026 23:31:26 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's datacenters on zscalertwo.net cloud by 2 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed

Update - Sat, 23 May 2026 02:17:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London III Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Fri, 22 May 2026 21:18:22 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our London III (LON3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is May 27, 1:00 pm PDT (May 27, 20:00 UTC)

End time is May 27, 6:00 pm PDT (May 28, 1:00 UTC)

Update - Thu, 28 May 2026 01:17:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Stockholm III Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Fri, 22 May 2026 21:12:52 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Stockholm III (STO3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is May 26, 9:00 am PDT (May 26, 16:00 UTC)

End time is May 26, 2:00 pm PDT (May 26, 21:00 UTC)

Update - Tue, 26 May 2026 20:53:55 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester 1 Datacenter Scheduled Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 22 May 2026 19:33:04 GMT

Zscaler will be performing hardware maintenance in Manchester 1 (MAN1) Datacenter.

Maintenance window,
Start: 2026-05-26 21:00 UTC
End: 2026-05-27 02:00 UTC
(Local Time 2026-05-26 22:00 - 2026-05-27 03:00 BST)

Expect to have brief interruptions during the maintenance window.

Update - Wed, 27 May 2026 01:19:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Scheduled Maintenance - zdxcloud.net

Fri, 22 May 2026 03:48:54 GMT

The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Friday at 06:00 AM UTC on 22 May, 2026, and can take up to 2 hours to complete. During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

Update - Fri, 22 May 2026 07:56:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance of Logging Clusters - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net, zslogin.net

Fri, 22 May 2026 01:09:18 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on our logging clusters. This maintenance is scheduled for Friday, May 22, 2026, at 6:00 PM Pacific Time (Saturday, May 23, 2026, 1:00 AM UTC) and may take up to 4 hours to complete.

Update - Sat, 23 May 2026 03:02:47 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscalerone.net

Thu, 21 May 2026 23:20:58 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Friday at 01:00 AM Pacific Time on May 22, 2026 (Friday, May 22, 2026 08:00 AM UTC), and can take up to 4 hours to complete.

Update - Fri, 22 May 2026 09:49:29 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - EMEA Region - zscalerthree.net

Thu, 21 May 2026 23:00:30 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's datacenters on zscalerthree.net cloud by 2 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed

Update - Fri, 22 May 2026 01:02:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Scheduled Maintenance - Extranet Enablement - zscaler.net

Thu, 21 May 2026 21:00:34 GMT

Zscaler will be performing scheduled maintenance on multiple sites to enable Zscaler Extranet Application Support. We expect minimal to no impact to services during the maintenance window.

Other Zscaler sites and services will continue to operate normally.

For more information, please visit:

Maintenance Window:

Start time is May 22, 2:00 pm PDT (May 22, 21:00 UTC)

End time is May 22, 7:00 pm PDT (May 23, 2:00 UTC)

Update - Sat, 23 May 2026 01:46:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance - zscalertwo.net

Wed, 20 May 2026 20:43:04 GMT

The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on zscalertwo.net cloud. This maintenance is scheduled for Saturday at 06:00 AM Pacific Time on May 23, 2026 (Saturday, May 23, 2026 01:00 PM UTC), and can take up to 4 hours to complete.

Latest Update - Sat, 23 May 2026 21:37:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 23 May 2026 16:25:15 UTC

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalertwo.net cloud by 3 hours.

Update - Sat, 23 May 2026 21:37:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Packet Capture Probing Issue - zdxcloud.net

Wed, 20 May 2026 16:31:24 GMT

Zscaler has identified an issue affecting the zdxcloud.net cloud. As a result, the Packet Capture Probing option is currently temporarily unavailable when starting a New Diagnostics Session.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Root cause of the issue is attributed to a control plane instability.

Latest Update - Mon, 25 May 2026 04:48:22 UTC

Zscaler has implemented a permanent fix for the control plane issue and reenabled the Packet Capture Probing with Deep Tracing feature bit. This issue is now resolved.

Update - Thu, 21 May 2026 15:10:19 UTC

Packet Capture Probing remains temporarily unavailable for New Diagnostics Sessions while Zscaler works on a fix. The issue has been identified, and deployment of the fix is planned during the scheduled maintenance window this weekend. The next update will be shared on Sunday, unless there is a significant change before then.

Update - Mon, 25 May 2026 04:48:22 UTC

Zscaler has implemented a permanent fix for the control plane issue and reenabled the Packet Capture Probing with Deep Tracing feature bit. This issue is now resolved.

Vienna I Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Wed, 20 May 2026 16:01:56 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Vienna I (VIE1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is May 21, 9:00 am PDT (May 21, 16:00 UTC)

End time is May 21, 5:00 pm PDT (May 22, 00:00 UTC)

Update 5/21: Extending Maintenance

Update - Fri, 22 May 2026 00:48:24 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZDX Server Error Issue - zdxcloud.net

Wed, 20 May 2026 10:11:17 GMT

Zscaler has detected an issue with its zdxcloud.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: Preliminary root cause of the issue is attributed to a control plane instability.

Latest Update - Mon, 25 May 2026 04:41:50 UTC

Zscaler has successfully deployed the permanent fix and after monitoring the stability the issue is now resolved.

Update - Wed, 20 May 2026 10:29:38 UTC

Update - Wed, 20 May 2026 14:46:49 UTC

We have identified the root cause for this issue and we are currently working to mitigate the issue.

Update - Wed, 20 May 2026 17:09:34 UTC

Zscaler has implemented preliminary mitigation measures to address the issue. The team is actively monitoring and evaluating the effectiveness of these measures.

Update - Wed, 20 May 2026 22:32:31 UTC

Zscaler continues to observe stable service operation following the previously implemented mitigation actions. Teams remain actively engaged in enhanced monitoring to validate continued platform stability. Further updates will be provided as appropriate.

Update - Thu, 21 May 2026 10:50:18 UTC

Mitigation efforts remain effective, and service metrics continue to be stable. Zscaler will maintain close monitoring throughout the week until the permanent fix is deployed during the weekend scheduled maintenance window.

Update - Mon, 25 May 2026 04:41:50 UTC

Zscaler has successfully deployed the permanent fix and after monitoring the stability the issue is now resolved.

Scheduled Maintenance Extended - CHI - zscalerthree.net

Wed, 20 May 2026 04:01:06 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance for CHI DCs by two hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Latest Update - Wed, 20 May 2026 06:41:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Wed, 20 May 2026 05:03:49 UTC

The team will be extending the scheduled maintenance for CHI DCs by one hour.

Update - Wed, 20 May 2026 06:41:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscalertwo.net

Wed, 20 May 2026 00:02:20 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalertwo.net cloud. This maintenance is scheduled for Tuesday at 6:00 PM Pacific Time on May 19, 2026 (Wednesday, May 20, 2026 01:00 AM UTC), and can take up to 30 minutes to complete. During the maintenance, the ZIA Admin Portal, and access to policy management will not be available. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends. Please contact Zscaler Support if you have additional questions.

Update - Wed, 20 May 2026 01:39:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - LON, HKG - zscalertwo.net, zscalerthree.net

Tue, 19 May 2026 22:21:45 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance for LON and HKG DCs by an hour. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Tue, 19 May 2026 23:13:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Inline DLP Policy Editing Issue for Non Super Admin Users - zscalertwo.net, zscalerthree.net

Tue, 19 May 2026 17:52:56 GMT

Zscaler is investigating an issue impacting tenants with Admin Ranking enabled, where administrators without Super Admin privileges may be unable to edit inline DLP policies after creation. Current investigation indicates newly created or existing inline DLP policies may be assigned an incorrect administrative rank value, preventing subsequent policy modifications by the original administrator. At this time, Super Admin accounts remain able to modify affected policies. Zscaler teams are actively investigating the issue and working toward a resolution.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root Cause: The issue was caused by a software defect that incorrectly marked inline DLP policies as read-only for non-Super Admin users.

Latest Update - Wed, 20 May 2026 07:20:44 UTC

Update - Tue, 19 May 2026 18:51:36 UTC

Zscaler has successfully identified the root cause of the ongoing service impact. Teams are actively executing mitigation efforts, and a hotfix has been prepared for a phased rollout to fully restore service functionality. Zscaler sincerely appreciates your patience and understanding as the team works to resolve this. Further updates will be provided as progress is made.

Update - Wed, 20 May 2026 07:20:44 UTC

Tokyo V (TYO5) Datacenter Network Maintenance - zscloud.net

Tue, 19 May 2026 10:53:27 GMT

Zscaler will be performing hardware maintenance in Tokyo V (TYO5) Datacenter.

Maintenance window:
Start: 2026-05-20 11:00 UTC
End: 2026-05-20 14:00 UTC
(Local Time 2026-05-20 20:00 - 2026-05-20 23:00 JST)

Update - Wed, 20 May 2026 12:48:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

DNS resolution Control Gateway issue on ZS2 - zscalertwo.net

Tue, 19 May 2026 05:58:16 GMT

Zscaler has detected an issue with its zscalertwo.net Cloud. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- Issue occurred due to an control-plane event that temporarily prevented control gateway DNS endpoints from being published.

Latest Update - Tue, 19 May 2026 06:23:10 UTC

Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational.

Update - Tue, 19 May 2026 06:05:14 UTC

Zscaler has successfully mitigated the issue by implementing corrective measures and is continuing to monitor the environment to ensure stability.

Update - Tue, 19 May 2026 06:23:10 UTC

Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational.

Upcoming New Data Centers and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 19 May 2026 04:32:17 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on May 15, 2026, we would like to notify you of the upcoming new data centers and expansions at the locations listed below. These would be available anytime on or after July 14, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Toronto III	137.31.56.0/23	Expansion of existing data center
Americas	Honolulu I	137.31.80.0/21	New data center
Americas	Honolulu I	137.31.88.0/23	New data center
Americas	Honolulu I	2605:4300:3d00::/40	New data center
APAC	Beijing III	220.243.158.0/24	Expansion of existing data center
APAC	Tokyo VI	137.31.64.0/20	New data center
APAC	Tokyo VI	2400:7aa0:2f00::/40	New data center

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Miami IV Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 18 May 2026 21:23:18 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Miami IV (MIA4) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on May 19, 2026

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Update - Wed, 20 May 2026 02:43:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming New DCs and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Mon, 18 May 2026 18:47:47 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on April 1st, 2026, we would like to remind you of the upcoming New DCs and expansions at the locations listed below. These would be available anytime on or after May 31, 2026

Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Montreal I	198.14.104.0/23	Expansion of existing data center
Americas	Seattle	198.14.106.0/23	Expansion of existing data center
Americas	Vancouver I	137.31.24.0/23	Expansion of existing data center
Americas	Vancouver I	137.31.26.0/23	Expansion of existing data center
EMEA	Amsterdam Il	137.31.28.0/23	Expansion of existing data center
EMEA	Amsterdam Il	137.31.30.0/23	Expansion of existing data center
EMEA	Zurich	137.31.20.0/23	Expansion of existing data center
EMEA	Zurich	137.31.22.0/23	Expansion of existing data center
APAC	Jakarta I	122.10.149.0/24	New RS* data center

*RS - Regional Surcharge (An additional subscription is required to use these data centers)

For more information, please visit:

https://config.zscaler.com/zpatwo.net/zpa

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Melbourne II Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Mon, 18 May 2026 16:48:53 GMT

Zscaler will be enabling IPv6 at our Melbourne II (MEL2) Data Center. During the maintenance window the services through MEL2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is May 21, 7:00 am PDT (May 21, 14:00 UTC)

End time is May 21, 2:00 pm PDT (May 21, 21:00 UTC)

Update - Thu, 21 May 2026 23:23:03 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Warsaw II Datacenter Scheduled Maintenance - Service Expansion - zscaler.net, zscloud.net

Mon, 18 May 2026 16:39:05 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Warsaw II (WAW2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is May 20, 9:00 am PDT (May 20, 16:00 UTC)

End time is May 20, 5:00 pm PDT (May 21, 00:00 UTC)

Update 5/20: Extending Maintenance

Update - Thu, 21 May 2026 05:29:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Madrid IV (MAD4) Datacenter Network Maintenance - zscalertwo.net

Mon, 18 May 2026 14:59:14 GMT

Zscaler will be performing hardware maintenance in Madrid IV (MAD4) Datacenter.

Maintenance window:
Start: 2026-05-19 18:00 UTC
End: 2026-05-19 21:00 UTC
(Local Time 2026-05-19 20:00 - 2026-05-19 23:00 CEST)

Update - Tue, 19 May 2026 21:01:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Madrid IV (MAD4) Datacenter Network Maintenance - zscloud.net

Mon, 18 May 2026 07:11:59 GMT

Zscaler will be performing hardware maintenance in the Madrid IV (MAD4) Datacenter.

Maintenance window,
Start: 2026-05-19 16:00 UTC
End: 2026-05-19 19:00 UTC
(i.e. 2026-05-19 18:00 - 21:00 Local Time)

Update - Tue, 19 May 2026 18:49:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zdxcloud.net

Sun, 17 May 2026 03:00:03 GMT

The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Sunday at 03:15 AM UTC on 17th May, 2026, and can take up to 2 Hours to complete. During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Sun, 17 May 2026 04:07:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on AMER Region - zscaler.net

Sat, 16 May 2026 05:48:01 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on AMER Region on the zscaler.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Sat, 16 May 2026 09:09:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Amsterdam II Datacenter Issue - zscalertwo.net

Sat, 16 May 2026 05:31:28 GMT

Zscaler has detected an issue with our Amsterdam II datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Root cause- The incident was caused by a BGP routing configuration issue.

Latest Update - Sat, 16 May 2026 08:04:26 UTC

Following a period of extended monitoring, all services are confirmed to be operating normally, and this incident is now resolved.

Update - Sat, 16 May 2026 05:58:37 UTC

Update - Sat, 16 May 2026 06:50:18 UTC

The Zscaler teams identified and resolved a BGP routing configuration issue that was causing service instability. All affected services have been restored to normal operation. We are continuing to monitor the environment to ensure sustained stability.

Update - Sat, 16 May 2026 08:04:26 UTC

Following a period of extended monitoring, all services are confirmed to be operating normally, and this incident is now resolved.

Urgent Maintenance - zdxcloud.net

Sat, 16 May 2026 04:39:28 GMT

The Zscaler SRE team will be performing an urgent maintenance on the zdxcloud.net cloud. This maintenance is scheduled for Saturday at 04:40 AM UTC on 16th May, 2026, and can take up to 2 Hours to complete. During this maintenance window the ZDX Admin Portal, including policy management, reporting access, and authentication of new users will not be available. As part of our standard maintenance process all logs will be collected and available after maintenance has completed.

Update - Sat, 16 May 2026 05:56:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Helsinki I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscalerthree.net

Fri, 15 May 2026 18:56:06 GMT

Zscaler will be enabling IPv6 at our Helsinki I (HEL1) Data Center. During the maintenance window the services through HEL1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is May 22, 9:00 am PDT (May 22, 16:00 UTC)

End time is May 22, 4:00 pm PDT (May 22, 23:00 UTC)

Update 5/22: Extending Maintenance

Update - Sat, 23 May 2026 00:18:19 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Helsinki I Datacenter Scheduled Maintenance - Service Expansion - zscloud.net

Fri, 15 May 2026 18:54:27 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Helsinki I (HEL1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit: