A major Microsoft 365 outage is currently disrupting email, messaging, and cloud productivity tools for hundreds of thousands of users worldwide on November 12, 2026. The widespread disruption has knocked Microsoft Outlook offline for many organizations while also degrading Microsoft Teams, Copilot, and OneDrive.
Microsoft confirmed the active incident under tracking code EX1550543 in its service health advisory. Even the public Microsoft 365 Service Health Status portal at status.cloud.microsoft has experienced intermittent loading failures for administrators seeking updates.
Third-party hosting and email partners such as GoDaddy also acknowledged the Microsoft 365 major outage on their status pages, warning customers that webmail and account logins are failing across all regions.
Microsoft Teams, Copilot, and Admin Center Also Impacted
Beyond email access, Microsoft is tracking a related service degradation under incident ID TM1550488 for Microsoft Teams. Users report that while basic chat messages may still go through, calendar integrations, meeting joins, and features linked to Exchange Online are failing.
Additional user reports indicate intermittent errors across Microsoft Copilot, OneDrive, and the Microsoft Store, while IT administrators have struggled to load the Microsoft 365 Admin Center to view live diagnostic logs.
Current Mitigation Status and What Administrators Should Expect
Microsoft stated in its latest update that engineers are aggressively pursuing all available mitigation paths to restore normal Exchange Online traffic and stabilize affected services. No estimated time for full recovery has been provided yet.
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