VWorkspace Reporting and licensing

Hi,

I'm trying to find out how many people have connected to VDI over a certain period. This will be ongoing report. Manager will use this to determine how many licenses we need and what is the usage (Sessions, licenses). At the moment I know people are connecting but I don't know how how to gather date.

Another questions is if I go to Management Console > File Licensing I see 0 In Use licenses even though people are connected. Is this supposed to show current license usage?