You are very welcome. PGP Universal is a PGP product that does a number of things, including producing custom built PGP Desktop installation packages that control what options are allowed to be set by individual users. If you are unaware of it, it would not seem to apply to your situation.
When you add a new user to the machine, upon either the new user logging in or the new user launching PGP Desktop, he/she should receive a prompt asking whether PGP will be used by that User. If you indicate the need to use PGP, I believe you will then be asked for the licensing data for being able to use it. If you have a group license with remaing seats, you can use it. I believe the EULA otherwise individual users to have individual licenses which you can obtain from Customer Care.