Overview
- Microsoft says recent Patch Tuesday changes caused sign‑in failures for personal Microsoft accounts across multiple apps.
- Impacted apps include Teams Free, OneDrive, Microsoft 365 Copilot, the Xbox app, the Microsoft Store, and in some cases Edge, Excel and Word.
- The confirmed cause is KB5079473 on Windows 11 24H2 and 25H2, with earlier notes initially describing a narrower issue centered on Teams Free and other versions.
- Users often see a misleading notice that the device lacks internet connectivity, sometimes accompanied by error code 0x800704cf.
- Enterprise Entra‑ID accounts are unaffected, and Microsoft advises restarting the PC while staying online to temporarily restore sign‑in.