Key Takeaways
1. Microsoft released KB5085516 on March 21, 2026, for Windows 11 24H2 and 25H2 to fix Microsoft account sign-in issues.
2. The update addresses problems preventing users from accessing apps, mistakenly showing a “no Internet” error.
3. Only users signing in with Microsoft accounts were affected; those using Microsoft Entra ID were not impacted.
4. KB5085516 includes quality improvements from the previous update (KB5079473) but primarily focuses on fixing sign-in failures.
5. There are currently no known issues with KB5085516, providing a clear solution for affected users.
Microsoft has rolled out KB5085516, an out-of-band update for Windows 11 24H2 and 25H2. This update brings the affected systems to OS Builds 26100.8039 and 26200.8039. Released on March 21, 2026, this patch is designed to fix an issue with Microsoft account sign-ins that arose after the cumulative update KB5079473 on March 10.
Sign-In Issues Addressed
Microsoft stated that the problem could prevent certain users from accessing apps using their Microsoft accounts, even when the device had a stable internet connection. The bug could mistakenly show a “no Internet” error, hindering access to services and applications like Microsoft Teams Free and OneDrive.
The company clarified that only those signing in with Microsoft accounts were impacted. Organizations utilizing Microsoft Entra ID for app authentication were not affected by this issue, according to Microsoft.
Quality Improvements Included
Along with solving the sign-in issue, KB5085516 also includes the quality enhancements from KB5079473. However, its primary focus is to fix the sign-in failures related to updates on or after March 10, 2026. This makes it a specific fix rather than a broad feature update.
Microsoft has stated that this update is being delivered via Windows Update for devices that have previously installed KB5079473. Users can also manually download it from the Microsoft Update Catalog. PCs set to “Get the latest updates as soon as they’re available” should receive the update automatically, while others can install it manually through Settings > Windows Update.
No Known Issues Reported
According to Microsoft’s support page, there are currently no known issues with KB5085516. This provides Windows 11 users who are facing Microsoft account sign-in problems with a clear official guidance to follow, especially for those affected by the March Patch Tuesday update.
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