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Fix Task Scheduler 'Authentication Failed' Permission Errors - Windows Defender Configuration Tool Network Error Fix-Resolve 504 Gateway Timeout When Running PowerShell in IIS

Updated 2026-06-13 20:14:15developer-tools
Fix Task Scheduler 'Authentication Failed' Permission Errors - Windows Defender Configuration Tool Network Error Fix-Resolve 504 Gateway Timeout When Running PowerShell in IIS
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.