Fix PowerShell Port Already Allocated Error 0x80072746 - OneDrive Sync Invalid Configuration: Troubleshooting Guide-Windows Security Certificate Error in Outlook 365: Fixes

Updated 2026-06-14 07:02:18office-tools

Fix PowerShell Port Already Allocated Error 0x80072746 - OneDrive Sync Invalid Configuration: Troubleshooting Guide-Windows Security Certificate Error in Outlook 365: Fixes

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.