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Fixing Edge Sync Error 0x80072efd on Windows - Troubleshooting Nginx Upstream Connection Refused-Cannot Access Network Share in Windows 10/11

Updated 2026-07-28 14:48:41browser-issues
Fixing Edge Sync Error 0x80072efd on Windows - Troubleshooting Nginx Upstream Connection Refused-Cannot Access Network Share in Windows 10/11
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.