Windows Defender Proxy Error: Setup Checklist for Fix - Resolve Outlook 502 Bad Gateway in Outlook 2019-How to Resolve Outlook Network Connection Error
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.
Related Software Guides
Chrome 502 Bad Gateway Error: Causes and Fixes
Fix 'cmd service unavailable permission denied' on Windows
How to Reset Windows Security Permissions for Access Denied
Fix Windows Terminal High CPU Usage and Error Code
Fix SSH 504 Gateway Timeout in Windows Terminal
Fix OneDrive Permission Denied Error 0x80070005