How to Fix 'Permission Denied' Error When Opening Outlook Attachments - Outlook Update Stuck on Downloading: How to Fix-How to Fix OneDrive Token Expired Error 0x8004de40

Updated 2026-06-17 19:20:41browser-issues
How to Fix 'Permission Denied' Error When Opening Outlook Attachments - Outlook Update Stuck on Downloading: How to Fix-How to Fix OneDrive Token Expired Error 0x8004de40
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.