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Fix Microsoft Store Proxy Error: Cannot Connect - How to Fix 504 Gateway Timeout in Windows Security-How to Sync Windows Defender Settings Between Devices

Updated 2026-06-13 16:05:59macos-help
Fix Microsoft Store Proxy Error: Cannot Connect - How to Fix 504 Gateway Timeout in Windows Security-How to Sync Windows Defender Settings Between Devices
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.