You can server-specifically view the currently logged-in users and their license types.
If necessary, you can also force certain users to log out by selecting the user and clicking Force Logout in the Logged-in Users dialog. This might be very useful, for instance, when concurrent licenses are used: The operation enables you to force the logout of idle users in order to release the license to be used by someone who actually needs it at the moment. Forcing active users to log out, however, normally does not affect them at all. Active users immediately get a license if available licenses exist.