If a user exits the program but does not sign out, the Login Manager stays in the system tray and appears yellow. The user is not connected to the database and does not use a database user license. The Login Manager only caches the user's login information, the username and password, on that workstation so that he does not have to enter it again when opening the program. However, if the maximum number of users are already logged into the database, and the user attempts to login with the saved login manager information, he will not be granted access.

Also refer to How to view users logged in the database (BB52082).