How to Fix Outlook Connection Timeout Error 0x80042108 - Port Already in Use But No Process Found-Remote Desktop Error 0x204: Troubleshooting Guide

Updated 2026-06-14 09:48:02developer-tools
How to Fix Outlook Connection Timeout Error 0x80042108 - Port Already in Use But No Process Found-Remote Desktop Error 0x204: Troubleshooting Guide
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.