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Fix OneDrive Sync Service Unavailable in Office 365 - How to Fix Microsoft Teams Cannot Connect Error-How to Fix Defender 504 Gateway Timeout Sync Issue

Updated 2026-06-13 22:52:26developer-tools
Fix OneDrive Sync Service Unavailable in Office 365 - How to Fix Microsoft Teams Cannot Connect Error-How to Fix Defender 504 Gateway Timeout Sync Issue
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.