Fix 'Windows Security Authentication Failed' for Domain Credentials - How to Fix CMD Crash Loop in Windows 10-Fix Outlook Setup Error 0x80004005 on Windows
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.