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Fix PowerShell Invoke-WebRequest Network Errors Behind a Proxy - Microsoft Teams 504 Gateway Timeout Sync Fix-Troubleshoot Outlook Connection Refused from Security Software

Updated 2026-06-14 12:13:33developer-tools
Fix PowerShell Invoke-WebRequest Network Errors Behind a Proxy - Microsoft Teams 504 Gateway Timeout Sync Fix-Troubleshoot Outlook Connection Refused from Security Software
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.