To enforce screen lock, Vanta requires a configuration to be created and requires every device to install this profile. 

Procedure

1. Go to Computer -> Configuration Profiles
   1. Create a new configuration profile (or edit the existing one)
2. Go to Login Windows -> Options -> enable Start screen saver after
3. Go to Security and Privacy -> enable Require Passcode to Unlock Screen
4. Save 

Common Issues

If a configuration profile requires a passcode, check if it's also set to automatically start a screen saver. This can be set in the Login Window settings for Jamf Configuration Profiles: