Microsoft 365 Services Disruption Affects Users in Japan and China
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On December 18, 2025, thousands of users in Japan and China experienced significant access and sign-in disruptions to Microsoft 365 services, including Teams, Outlook, and Copilot. The outage was attributed to a critical routing issue within Microsoft's infrastructure, confirmed by the company's admin center status page, which indicated that the outage began around 12:00 AM UTC (8:00 AM JST / 8:00 AM CST).
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