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incident tm1200517

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    Microsoft Teams Outage December 19 2025: TM1200517 Messaging Delays

    Microsoft confirmed a Microsoft Teams service incident on December 19, 2025 that produced widespread message delays and degraded functionality for many users worldwide, and the disruption — tracked in the Microsoft 365 admin center as incident TM1200517 — prompted a flurry of user reports...
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    • cloud outages incident tm1200517 it administration microsoft teams
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    • Forum: Windows News
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