Sorry I just saw this question. This type of report is available with the Analytics Module but that module is a subscription based addition to Jive. If you have this functionality I can show you how to get that report generated.
Alternatively, if you just need a count of active users you should be able to download member data that shows view counts in the admin console. Under the "Reports" tab if the analytics database is available (you'll know when you get there as the Dashboard will say "enable analytics") then at the bottom of the Dashboard is a section called Data Exports. Click the "members" export (first one) and in the options select the activity download (second radio button).