Microsoft Azure OpenAI Outage History

Every past Microsoft Azure OpenAI outage tracked by IsDown, with detection times, duration, and resolution details.

There were 2 Microsoft Azure OpenAI outages since September 2025. The 2 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Major January 27, 2026

January 2026: Active- Azure OpenAI Service issues in Sweden Central

Detected Jan 27, 2026 1:24 PM UTC · Resolved Jan 27, 2026 5:28 PM UTC · Duration about 4 hours

Minor September 27, 2025

September 2025: Multi-service impact in Switzerland North

Detected Sep 27, 2025 1:28 AM UTC · Resolved Apr 16, 2026 1:00 PM UTC · Duration 7 months

A deployment error introduced a malformed certificate prefix in Switzerland North starting at 23:54 UTC on September 26, 2025, causing service unavailability and degraded performance across multiple Azure services including Virtual Machines, Azure OpenAI, Storage Accounts, and other regional resources. Virtual Machines were shut down to preserve data integrity due to the connectivity issues. Microsoft identified the faulty deployment and initiated a rollback to restore normal service, with full mitigation expected by 05:30 UTC.