Fix Command Prompt Backup Fails with Access Denied - Resolve PowerShell WebRequest 504 Timeout-OneDrive Mac Problems: Step-by-Step Fixes

Updated 2026-06-13 21:46:19macos-help
Fix Command Prompt Backup Fails with Access Denied - Resolve PowerShell WebRequest 504 Timeout-OneDrive Mac Problems: Step-by-Step Fixes
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.