Fix Microsoft Teams Proxy Error Not Connecting - Troubleshooting 0x800704ec in Windows Defender-Fix PowerShell Network Error: Could Not Establish Trust Relationship

Updated 2026-06-14 09:30:21cloud-software
Fix Microsoft Teams Proxy Error Not Connecting - Troubleshooting 0x800704ec in Windows Defender-Fix PowerShell Network Error: Could Not Establish Trust Relationship
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.