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Microsoft 365 Consumer Outage History

Every past Microsoft 365 Consumer outage tracked by IsDown, with detection times, duration, and resolution details.

There were 127 Microsoft 365 Consumer outages since May 2022. The 39 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Major March 18, 2026

March 2026: Users may intermittently be unable to join meetings or access Microsoft Teams Free for Windows

Detected Mar 18, 2026 2:53 PM EDT · Resolved Mar 20, 2026 2:12 PM EDT · Duration 2 days

A recent Windows update introduced a regression that caused Microsoft Teams Free users on Windows to intermittently be unable to join meetings or access the service, with users seeing authentication error messages stating "We couldn't authenticate you" due to device, network, or technical issues. The incident affected multiple Windows versions (25H2, 24H2, 23H2, and 22H2) and lasted 47.3 hours while Microsoft developed a fix to address the regression. Users could temporarily resolve the issue by restarting their computers as a workaround during the incident.