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Microsoft reports Outlook and Teams disruptions tied to unavailable servers

Downdetector logged nearly 130,000 reports of Microsoft 365 problems, and Microsoft says unavailable servers, not traffic, drove the load.

Published Nov 12, 2026 · 21:56 UTC8 reports

The short version

  • Microsoft reported Exchange Online mailbox and Teams problems on Thursday, as Downdetector logged nearly 130,000 reports.[ABC News · The Guardian]
  • Microsoft said unexpectedly unavailable servers, not higher traffic, drove the elevated load, and it paused deployments while restarting affected servers.[BBC News · ABC News · The Guardian]
  • Wired reported there is currently no indication that a cyberattack caused the outage.[Wired]

Key facts

  • Microsoft reported issues with Exchange Online mailboxes and Microsoft Teams on Thursday.[ABC News]
  • Downdetector showed a spike in Microsoft 365 problems, with nearly 130,000 reports of issues.[The Guardian]
  • Microsoft said the elevated load was driven by unexpectedly unavailable servers, not an increase in traffic.[BBC News · ABC News · The Guardian]
  • Microsoft said it paused all deployments and was restarting affected servers.[ABC News · The Guardian]
  • Wired reported there is currently no indication that a cyberattack caused the outage.[Wired]

What remains uncertain

  • Microsoft's account of the cause is the company's own statement and is not independently verified in these reports.[BBC News · ABC News · The Guardian]
  • The nearly 130,000 figure counts user reports of problems, not confirmed affected accounts.[The Guardian]

Sources

Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.