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Fix OneDrive Sync Authentication Failed Error on Windows 11 - Fix OneDrive Sync Service Unavailable (0x8004de40)-Fix PowerShell Execution Policy Error on Windows 11

2026-06-16 06:35:53office-tools
Fix OneDrive Sync Authentication Failed Error on Windows 11 - Fix OneDrive Sync Service Unavailable (0x8004de40)-Fix PowerShell Execution Policy Error on Windows 11

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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