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.