Disabling guest mode
You should disallow guest mode for managed Google domains.
To disallow guest mode:
- In the Google Admin console, go to Devices > Chrome management > Device settings.
- On the left, select the organization that contains the desired users or enrolled browsers. To select all users and browsers, select the top-level organization. Otherwise, select a child.
- Under Sign-in settings, for Guest mode, select Disable guest mode.
- Click Save.