BitLocker Connection Refused: Troubleshooting Steps - How to Resolve Defender Token Expired Error-Fix PowerShell Proxy Error 407: Authentication Required

Updated 2026-06-18 16:57:17office-tools
BitLocker Connection Refused: Troubleshooting Steps - How to Resolve Defender Token Expired Error-Fix PowerShell Proxy Error 407: Authentication Required
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.