Fix Task Scheduler Proxy Authentication Failed Error - Office 365 Outlook Token Expired Troubleshooting-Fix Windows Defender Real-Time Protection Turning Off

Updated 2026-06-15 00:29:00cloud-software
Fix Task Scheduler Proxy Authentication Failed Error - Office 365 Outlook Token Expired Troubleshooting-Fix Windows Defender Real-Time Protection Turning Off
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.