Microsoft 365 outage hits Exchange Online, Copilot, Defender, Teams and more
Kyrannio · x · 2026-11-13
Microsoft is working to isolate a server availability issue (incident MO1550821) affecting a wide swath of Microsoft 365 services.
- Exchange Online: mailbox access issues across Outlook web, desktop (MAPI), EAS and REST connections, plus delayed email delivery
- Copilot 365: users may be unable to load Copilot Chat or access work data like email, calendar and files
- Security & admin: Defender Safe Links can't verify URLs, Defender XDR portals fail to load, and multiple Purview services (DLP, auto-labeling, compliance) are impacted
- Others: Microsoft Graph API timeouts on Exchange data, Teams calendar/meeting scheduling failures, Power BI and Fabric export issues, plus Intune, Planner, To Do and Universal Print
Core Teams messaging and online meetings remain largely functional while Microsoft isolates the root cause.
Related event: Microsoft Global Outage Knocks Out Outlook, Teams and Copilot for Hours(35 posts)→
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