To fix the Microsoft 365 authentication or initialization failed error, follow these solutions: Verify your internet connection Check your account credentials ...

Microsoft has fixed a known issue causing authentication problems when Credential Guard is enabled on systems using the Kerberos PKINIT pre-auth security protocol.

Microsoft has fixed a known issue causing authentication problems on Windows Server domain controllers after installing the April 2025 security updates.

If you encounter Proxy Authentication Error 2606 in OneDrive and your client is unable to connect to Microsoft server, check out these solutions.

Microsoft’s July 2025 Patch Tuesday fixes 137 vulnerabilities, including critical flaws in SQL Server, Netlogon, Office, and the .NET Framework.