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

Procedure

• Go to Computer
•  Select Configuration Profiles
  • Create a new configuration profile (or edit the existing one)
• Go to log in Windows, select Options, and enable Start screen saver after
• Go to Security and Privacy and enable Require Passcode to Unlock Screen
• Save 

Keep in Mind

• 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: