A big Microsoft outage disrupted access to OpenAI and Anthropic tools within Microsoft 365 apps. OpenAI flagged elevated errors on November 12, while Anthropic traced similar issues to a Microsoft service incident. Fixes started rolling out by late afternoon, but many users still got trouble connecting to email and chat features.
A big Microsoft outage has caused headaches for some users using OpenAI's or Anthropic's AI tools with Outlook, Teams, or other Microsoft 365 apps.
Both companies say users might have trouble connecting or using features like email, calendar, and chat because of issues on Microsoft's end.
OpenAI first flagged "elevated errors" with the Microsoft 365 connector on November 12 and is still investigating.
Anthropic spotted similar problems that same day and traced them to a Microsoft service incident.
By late afternoon, fixes were rolling out, but full recovery hasn't happened yet, so Anthropic suggests keeping an eye on updates from Microsoft if you're affected.