Fix OneDrive Not Syncing with Red X Icon - Fix Outlook Login Loop with Modern Authentication-Fix Windows Store Error 0x80073cf9

Updated 2026-06-14 03:37:13cloud-software
Fix OneDrive Not Syncing with Red X Icon - Fix Outlook Login Loop with Modern Authentication-Fix Windows Store Error 0x80073cf9
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.