Dear James Hamilton,
Based on your description, it appears the registry changes are successfully applied during full Remote Desktop sessions but not during Remote App sessions. This behavior is expected, as Remote App sessions may initialize user profiles differently and can bypass certain logon scripts or Group Policy settings that typically apply during full desktop logins.
To ensure the registry settings are applied consistently in Remote App sessions, we recommend the following:
Use Group Policy Preferences to enforce the registry keys at logon, ensuring they apply regardless of session type.
Confirm that the Remote App session is loading the full user profile and not using a temporary or minimal profile.
Consider deploying a logon script that explicitly sets the registry values during Remote App initialization.
I hope this helps. Just kindly tick Accept Answer that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated.
Best regards,
Domic Vo