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Windows Terminal 504 Error: Step-by-Step Troubleshooting Checklist - Resolve Port 993 Already in Use in Outlook-Windows 11: How to Run PowerShell Scripts

Updated 2026-06-14 06:20:21cloud-software
Windows Terminal 504 Error: Step-by-Step Troubleshooting Checklist - Resolve Port 993 Already in Use in Outlook-Windows 11: How to Run PowerShell Scripts
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.

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