KB5085516: Microsoft account sign in Fixed

March 21, 2026—KB5085516 (OS Builds 26200.8039 and 26100.8039) Out-of-band

es from previous security and non-security releases, along with an additional fix. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates.

To view the latest updates about this release, visit the Windows release health dashboard or the update history page for Windows 11, version 25H2 and 24H2.

Improvements
This OOB contains quality improvements from KB5079473 (released March 10, 2026). The following summary outlines key issues addressed by this update. The bold text within the brackets indicates the item or area of the change.

• [Microsoft account sign in] Fixed: After you install the Windows update released on or after March 10, 2026, some users might experience an issue signing in to apps with a Microsoft account. Even when the device has a working Internet connection, a “no Internet” error appears during sign in and prevents access to Microsoft services and apps such as Microsoft Teams Free and OneDrive.