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What we know about the global Microsoft outage

What we know about the global Microsoft outage

Also reported by France24, Guardian World, Al Jazeera, Newsweek, ABC News

Full coverage (6 outlets)

Summary

A global Microsoft outage disrupted Microsoft 365 services, including Outlook, Teams and Copilot, with some users unable to access email, files or calendar details. Microsoft said the issue involved unavailable servers and heavy traffic across multiple regions, ruled out a cyberattack and reported that its attempted fixes were not working as expected.

Key Facts

  • Downdetector recorded nearly 140,000 Outlook problem reports from 74 countries on Thursday evening.
  • Microsoft 365 services affected included Outlook, Teams and Copilot.
  • Some users could not send or receive email or access certain files and calendar details, while some continued using Teams normally.
  • Microsoft said a portion of its infrastructure faced elevated load across multiple regions.
  • Microsoft said many servers became unexpectedly unavailable, increasing traffic on the remaining servers.
  • Microsoft ruled out a cybersecurity incident but had not confirmed the exact cause.
  • OpenAI and Anthropic reported problems linked to the outage, and government agencies in Singapore and Australia also reported effects.
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