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Fix OneDrive 504 Gateway Timeout Sync Error - Troubleshooting Windows Defender Not Turning On-Reset OneDrive Sync Without Data Loss

Updated 2026-06-14 06:31:28developer-tools
Fix OneDrive 504 Gateway Timeout Sync Error - Troubleshooting Windows Defender Not Turning On-Reset OneDrive Sync Without Data Loss
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.