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Microsoft Windows 11 KB5079473 Microsoft account sign-in disruption

Service Disruption
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Last updated
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1 unique sources, 2 articles

Summary

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Microsoft's Windows 11 KB5079473 update is disrupting Microsoft account sign-ins across multiple apps, creating false no-internet errors and blocking normal access for affected users. The issue matters because it hits core productivity tools including Teams, OneDrive, Edge, Excel, Word, and Microsoft 365 Copilot. Microsoft says Entra ID authentication is not affected, and a temporary restart while online may clear the broken connectivity state.

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Timeline

  1. 23.03.2026 10:04 1 articles · 2mo ago

    Microsoft releases KB5085516 emergency fix for Microsoft account sign-in bug

    Mitigation Patch Update

    Microsoft started rolling out the KB5085516 optional out-of-band update to fix the Microsoft account sign-in bug that appears after KB5079473 on Windows 11 25H2 and 24H2. The update addresses the false no-internet sign-in failure affecting Microsoft Teams, OneDrive, Microsoft Edge, Microsoft 365 Copilot, Excel, and Word, and it is available through Windows Update or the Microsoft Update Catalog.

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  2. 20.03.2026 09:33 1 articles · 2mo ago

    Microsoft confirms Windows 11 KB5079473 sign-in disruption

    Initial Disclosure

    Microsoft says the March Windows 11 update KB5079473 breaks Microsoft account sign-ins across Teams, OneDrive, Microsoft Edge, Excel, Word, and Microsoft 365 Copilot, and can display a false no-internet warning even when the device is online. The issue affects Microsoft account authentication, does not affect Entra ID-based app authentication, and may be temporarily cleared by restarting the device while it remains connected to the Internet.

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