Admins can edit all user data either from TeamTools or from the G Suite admin console. In addition, G Suite admins can designate other users as TeamTools admins, allowing them to edit data only from within TeamTools. Just go to the Admin Tools section in TeamTools.
Admins can hide or show both users and groups from within TeamTools, or from the G Suite admin console if they are G Suite admins. Admins can also create and delete custom fields for users, and if desired, allow all users to edit their own data. All these features are in the Admin Tools section in TeamTools.
As with all changes made directly in G Suite, it may take up to 24 hours for the change to appear in the Google APIs and therefore in TeamTools.