Configuring Microsoft Teams Proxy Settings: A Practical Guide - How to Resolve Teams 'Service Unavailable' for a Specific User-Fix RDP 504 Gateway Timeout via IIS Configuration
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.