Microsoft says the March Windows 11 cumulative update KB5079473 causes Microsoft account sign-ins to fail across multiple apps, including Teams, OneDrive, Edge, Excel, Word, and Microsoft 365 Copilot. Microsoft is working on a fix, recommends restarting devices while connected to the internet as a temporary workaround, and has issued out‑of‑band updates and additional guidance for related Windows 11 issues. #Windows11 #KB5079473
Keypoints
- The KB5079473 March update triggers sign-in errors for Microsoft account–based authentication across several Microsoft apps.
- Impacted apps display an incorrect “You’ll need the Internet” error even when devices are online.
- Business accounts using Entra ID (Azure AD) are not affected by this sign-in issue.
- Microsoft suggests restarting the PC while connected to the internet as a temporary workaround.
- Microsoft is developing a permanent fix and has released OOB updates for other Windows 11 issues and guidance for Samsung Galaxy Connect–related C: drive problems.