User Authentication Issue on Capetown IV and Johannesburg III Datacenters

Zscaler has detected an issue with its Capetown IV and Johannesburg III datacenters and is currently investigating the matter. 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.Latest Update - Wed, 28 Jan 2026 21:25:36 UTCZscaler identified a connectivity issue with an upstream internet service provider affecting the Cape Town (CPT4) and Johannesburg (JNB3) data centers. Some customers may have experienced intermittent authentication issues or degraded connectivity when accessing international destinations. Zscaler engaged the provider immediately and implemented protective measures while the issue was addressed. Network conditions have improved, services are recovering, and monitoring remains in place to ensure stability.Update - Wed, 28 Jan 2026 20:20:27 UTCZscaler 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 - Wed, 28 Jan 2026 21:25:36 UTCZscaler identified a connectivity issue with an upstream internet service provider affecting the Cape Town (CPT4) and Johannesburg (JNB3) data centers. Some customers may have experienced intermittent authentication issues or degraded connectivity when accessing international destinations. Zscaler engaged the provider immediately and implemented protective measures while the issue was addressed. Network conditions have improved, services are recovering, and monitoring remains in place to ensure stability.