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Fix Windows Defender Sync Issues with Microsoft 365 - How to Unlock a File Locked by Unknown User in RDP-Error 0x80070643: Practical Fixes for Windows Update

Updated 2026-06-14 07:39:59macos-help
Fix Windows Defender Sync Issues with Microsoft 365 - How to Unlock a File Locked by Unknown User in RDP-Error 0x80070643: Practical Fixes for Windows Update
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.