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Microsoft struggles to fix huge outage affecting Outlook and Teams

Microsoft services such as Outlook and Teams were disrupted for about 10 hours on Thursday as the tech giant struggled to fix issues with some servers, hitting businesses and government agencies globally that use the popular platforms.

✦ Extractive summary — built from the sources' own reporting•From 5 sources•1 min read•Updated November 13, 2026, 4:24 AM UTC
Key points
  • Microsoft said the outage was caused by servers unexpected becoming unavailable, straining other systems.
  • A Microsoft spokesperson said the company “had no indication of a cyber-attack”.
  • The company blamed elevated infrastructure loads and said it was working to restore services.

A Microsoft outage disrupted Outlook and Teams worldwide, with reports from scores of countries and territories.

Microsoft says servers unexpectedly went offline, disrupting Outlook email, Teams, Copilot and other services.

How this summary was made: extractive summary — built from the sources' own reporting. It is drawn only from the reporting of the sources listed below — read the originals for full detail. How we summarize →

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Every article behind this summary — 5 articles from 5 outlets