
Fix OneDrive Sync ‘Service Unavailable’ and ‘Permission Denied’ Errors
When OneDrive reports “Service Unavailable” or “Permission Denied” during sync, the problem is us...

When OneDrive reports “Service Unavailable” or “Permission Denied” during sync, the problem is us...

You log into a system, open Command Prompt, and immediately see an error that your authentication...

If you see a message that your Windows Defender token has expired, it usually means the security ...

If OneDrive won't start syncing, often a full reinstall and reconfiguration resolves the issue. T...

You see error 0x80070520 with the message 'The security token has expired.' This usually happens ...

If you're building integrations or bots for Microsoft Teams, you've likely hit a 429 Too Many Req...