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Fix Windows Defender Sync Error 504 Gateway Timeout - Outlook Module Missing Error Fix Windows 10-How to Fix PowerShell Connection Refused Error

Updated 2026-06-15 01:47:48developer-tools
Fix Windows Defender Sync Error 504 Gateway Timeout - Outlook Module Missing Error Fix Windows 10-How to Fix 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.