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Microsoft's Massive M365 Outage Stretches Past 20 Hours as Its Fixes Keep Failing

Summary by The Register
Hasn't completely ruled out cyberattack as cause of incident that's damaged Exchange Online and services that rely on it

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A global failure in Microsoft 365 is affecting about 20 services including Outlook, Teams and Copilot. New Microsoft measures are starting to signal improvement in system stability.

·Bonn, Germany
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The global failure is already consolidated as one of the longest in the company's infrastructure. "We have monitored the state of the changes applied to improve operationality and confirmed that they are not working as expected," they said.

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The Register broke the news in London, United Kingdom on Friday, November 13, 2026.
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