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Microsoft Service Disruption Leaves Outlook Email Crippled for Hours
2026-01-23 /
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Author：小编
On January 22, 2026, Microsoft encountered a series of service disruptions, causing the Office 365 application suite—which encompasses Outlook email and Teams instant messaging software—to be out of commission for normal operations across North America for the entire day. According to data from fault-tracking websites, over 15,000 users reported problems with Microsoft 365 products. Specifically, 12,000 users encountered issues with Outlook, while 500 users experienced problems with Teams. Microsoft acknowledged that it had detected an issue with sending and receiving emails in Outlook and was actively investigating the cause of the service disruption.
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