Reporting Question

Hello - The company I work for is split into three business areas and I need to be able to report how many calls etc.. are logged by each group. Our Active Directory info for each user has a field that defines the business area they work for. what I need to know is can I run a report that will drill down into this data? I will be using crystal reports to query the database, but cannot see how I would drill down into this data.

The only work around I can think of would be to have an additional field on the call creation screen and get the helpdesk to select which business area it is. Only downside to this is that the helpdesk could forget to select a value for the dropdown (mandatory fields not available yet!?? please please soon :-) )...

any help great appreciated.

cheers
Pete