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Microsoft Outlook Down? Email Problems Hit Users Across the World - Here's What We Know

Microsoft said affected customers are seeing intermittent sign-in failures and “too many requests” errors as it investigates the service disruption.

  • On Monday April 27, Microsoft Outlook experienced a service disruption causing intermittent sign-in failures and unexpected logouts, with the company's status page flagging the incident as "service degradation."
  • Beginning around 5 a.m., outage tracker DownDetector reported a spike in error reports, with Microsoft confirming some Business and Enterprise customers were experiencing service interruption.
  • Login failures account for 64 per cent of reported issues, with more than 800 users reporting problems in the UK and more than 400 noting similar issues in the US.
  • Affected customers are seeing "too many requests" errors and unexpected signouts, while Microsoft said "our investigation indicates client sign-in scenarios may be contributing to the reported behaviour."
  • Recent issues included Exchange Online outages last month affecting mailbox access via Outlook desktop and web; users experiencing persistent "too many tries" errors should wait 30 minutes without login attempts.
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Microsoft's Outlook email service has been down for many users around the world since early Monday morning.

·Montreal, Canada
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BleepingComputer broke the news on Monday, April 27, 2026.
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