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Fix 'Outlook Data File Cannot Be Accessed' Error in Outlook 365 - Fix Windows Defender Update Failed Errors-Troubleshoot PowerShell Connection Refused Error

Updated 2026-06-14 03:28:00browser-issues
Fix 'Outlook Data File Cannot Be Accessed' Error in Outlook 365 - Fix Windows Defender Update Failed Errors-Troubleshoot PowerShell Connection Refused Error
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.