Outage9 sources
Multiple Microsoft 365 services are experiencing an outage
Engadget · By Anna Washenko ·
The Brief · written from 9 sources
- Microsoft Outlook, Teams, and other Microsoft 365 services went down for users worldwide on November 12, 2026.
- Microsoft says failed server health checks and "elevated load" caused many servers to become unexpectedly unavailable.
- Microsoft is still investigating the cause and has disclosed no evidence of a cyberattack.
Why it matters
Developers relying on Outlook, Exchange Online, Teams, Copilot, or Microsoft Cloud connections may face disrupted email, collaboration, and integration workflows while the outage lasts.
Who’s affected
- Organizations using Microsoft 365 and Exchange Online
- Teams using Microsoft Cloud connections and Copilot integrations
- Users of OpenAI and Anthropic connectors to Microsoft 365 accounts
Outlook and Teams are among the platforms impacted by "elevated load" issues.
Timeline
Outage reports of Outlook and Microsoft 365 access problems begin to surface worldwide
Microsoft acknowledges the issue via its Microsoft 365 Status account, citing elevated load and failed server health checks
Hacker News: Front Page
Ask HN: Microsoft/Azure Outage?
TechCrunch
Microsoft’s Outlook email hit by new outage
Engadget - Technology News & Expert Reviews
Multiple Microsoft 365 services are experiencing an outage
Techmeme
Users report being unable to access Outlook, Teams, and other Microsoft 365 services; Microsoft says many of its servers became unexpectedly unavailable (Anna Washenko/Engadget)
Security Latest
Major Microsoft Outlook Outage Leaves People With Email Jobs Unable to Email
BleepingComputer
Massive Microsoft 365 outage disrupts Outlook, Teams, Copilot worldwide
Security Affairs
Microsoft Cloud Outage Hits Outlook, Teams, Copilot and AI Services
Tech | The Verge
Microsoft Outlook is down
SecurityWeek
Microsoft 365 Outage Disrupts Outlook, Exchange Online and Teams