Hi StevenM2330 ...
Could this be something in your environment? Here is my testing setup:
- Windows 10 Enterprise for Virtual Desktops (22H2 build 19045.3930)
- Microsoft 365 MSO (Version 2401 Build 16.0.17231.20194) 64-bit
- Classic Teams (machine-wide installer)
- New Teams (bootstrapper install)
- FSLogix 2.9.8784.63912 (Profile container only using VHDLocations)
- AVD session as well as RDP session for testing
When my user signs in, nothing automatically starts except OneDrive. I launch new Teams and it opens successfully. I go to settings and enable "Auto-start Teams" option. Sign out and sign in and Teams automatically starts.
This should be stored in the users profile (%localappdata%\Packages\MSTeams_8wekyb3d8bbwe\LocalCache\Microsoft\MSTeams\app_settings.json). If the user enables the settings you should see this in the json file:
"user_modified_auto_start":true,
"open_app_in_background":false,
"open_file_in_desktop_app":false,
"keep_app_running_on_close":true,