No, GAT has to be installed and deployed for all the users of the organisation, this is not only for billing purposes but also technical purposes. To do a proper audit of all aspects of the Google Workspace environment, we must audit every user to see how they interact with one another. This is necessary for proper email auditing, proper collaboration measurement and depending on the version of Google Workspace that you have, it is necessary for proper Drive audits, in particular where visitor events are recorded. Email us at for more information