Group Licensing allows fine tuning of the license usage by providing a means of reserving and/or limiting the license usage relative to license groups. For example, in a 15 user license, you can reserve 2 license for "admin" users, and limit the "remote" users to no more than 5 licenses.
When group licensing is enabled (in the license code), A-Shell will call BAS:ASLICGRP.SBX on startup (if it exists) to determine which license group the current user should be assigned to, and also to specify the number of licenses that each group should be allocated or limited to.
See the sample ASGRPLIC.SBX source code in [907,52] of the SOSLIB for details on the calling interface.