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Fix OneDrive Sync Stuck on 'Processing Changes' - PowerShell 504 Gateway Error Fix for Windows Update-Outlook Folder Access Denied Fix

Updated 2026-06-14 14:04:08browser-issues
Fix OneDrive Sync Stuck on 'Processing Changes' - PowerShell 504 Gateway Error Fix for Windows Update-Outlook Folder Access Denied Fix
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.