Track user license usage and activity for named users

Can we get a "last logged on" report in the user export? I want to manage our license assignments, and right now everybody that asks for an Adobe licenses gets one. I want to remove inactive users to control license allocation. I could not find a report. According to Adobe Support, they cannot track login activity because we use named user licenses. They did suggest that I could export the Content Logs, that's better than nothing but a last activity would make much more sense.