Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved.
Root Cause: Preliminary root cause is attributed to an internal backend infrastructure issue, which has since been fully resolved.
Following the actions previously taken by Zscaler, the incident has been resolved.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
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 closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
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 closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Services have recovered following remediation of a network configuration issue by our infrastructure partner. We are continuing to monitor the environment to ensure stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
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 closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
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 closely to ensure ongoing stability.
Tokyo IV and Tokyo V Data Center Issue - zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
The performance issue has been resolved. The degradation was observed between 0800–1000 Japan time following resumption of business activity post a holiday period, and recovered without any intervention. The environment is confirmed stable.
Legacy Incident Archive
453 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.
April 2026
Chicago I (CHI1) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in the Chicago I (CHI1) Datacenter.Maintenance window,Start: 2026-4-13 03:00 CDTEnd: 2026-4-13 05:00 CDT(i.e. 2026-4-13 08:00 - 10:00 UTC)No service impact is expected during this maintenance.
Maintenance Window Updates - zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler is updating the maintenance window schedule for Oceania, APAC and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.Time (in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM9:00 AM – 12:00 PM 9:00 AM – 12:00 PM Asia Pacific8:00 PM – 10:00 PM8:00 PM – 10:00 PM8:00 PM – 10:00 PM4:00 PM – 7:00 PM 1:00 PM - 4:00 PM3:00 PM – 6:00...
Maintenance Window Updates - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler is updating the maintenance window schedule for Oceania, APAC and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring. Time(in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM9:00 AM – 12:00 PM 9:00 AM – 12:00 PM Asia Pacific8:00 PM – 10:00 PM8:00 PM – 10:00 PM8:00 PM – 10:00 PM4:00 PM – 7:00 PM 1:00 PM - 4:00 PM3:00 PM –...
Maintenance Window Updates - zscalertwo.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler is updating the maintenance window schedule for Oceania, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.Time (in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM 9:00 AM – 12:00 PM9:00 AM – 12:00 PM Asia Pacific8:00 PM – 10:00 PM8:00 PM – 10:00 PM8:00 PM – 10:00 PM 4:00 PM – 7:00 PM1:00 PM -4:00 PM EMEA8:00 PM...
Maintenance Window Updates - zscaler.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler is updating the maintenance window schedule for Oceania, APAC, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.Time (in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM 9:00 AM – 12:00 PM9:00 AM– 12:00 PM9:00 AM– 12:00 PMAsia Pacific8:00 PM – 10:00 PM8:00 PM – 10:00 PM8:00 PM – 10:00 PM 4:00 PM – 7:00 PM1:00 PM– 4:00...
Maintenance Window Updates - zscalerone.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler is updating the maintenance window schedule for Oceania, EMEA and AMER regions. The new schedule is effective starting April 23, 2026. Service updates for all regions will be recurring.Time(in UTC- Coordinated Universal Time)REGIONMONTUESWEDTHUFRISATSUNOceania 9:00 AM – 11:00 AM9:00 AM – 11:00 AM 9:00 AM – 12:00 PM9:00 AM – 12:00 PM EMEA 1:00 AM– 4:00 AMAMER 6:00 AM – 8:00 AM6:00 AM – 8:00 AM6:00 AM – 8:00 AM ...
Delay in Processing Inbound Emails to Support Cases - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, app.zsdpc.net, app.eu.zsdpc.net, zpabeta.net, zsdkone.net, zscalerrisk.net, admin.zscaleranalytics.net, zslogin.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler is aware of an issue impacting delay in processing inbound emails to support cases.Zscaler services are operating normally; delays are currently impacting the synchronization of inbound email communications related to support cases. This is due to a dependency issue with our service provider that is affecting email processing, leading to slower updates. Zscaler is actively coordinating with the service provider to restore normal functionality.Impact: During this time, customers m...
Scheduled Maintenance - zscaler.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
The Zscaler Site Reliability Engineering team will be performing a scheduled maintenance on zscaler.net cloud. This maintenance is scheduled for Saturday at 06:00 AM Pacific Time on April 11, 2026 (Saturday, April 11, 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 up...
Zscaler is currently investigating reports of issues with its zscaler.net, zscloud.net Cloud. Customers using IdP-initiated authentication may experience login failures.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 recently enabled feat...
