You can add licenses to Infor CRM (formerly Saleslogix) by using the Administrator application.
Code sample to get the current licenses in the system.
How SalesLogix web view users have access to areas controlled in the SalesLogix 7.5.2 web client.
The SalesLogix SLXUserService class in the Sage.SalesLogix.Security assembly allows you to get a reference to the current user’s IUser interface. With a reference to the current IUser interface you can then check the user’s Type property to see what type of User license the user has.
Another way to think of a named user license is like having a reserved parking space in the parking lot