Fix PowerShell Connection Refused Errors in Scripts - Resolve Microsoft Teams DNS Error Code 0xcaa20002-How to Fix could not build server_names_hash in Nginx

Updated 2026-06-15 05:34:02security-tools
Fix PowerShell Connection Refused Errors in Scripts - Resolve Microsoft Teams DNS Error Code 0xcaa20002-How to Fix could not build server_names_hash in Nginx
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.