Is there any log or history of license assignment to a user?
One answer
In the JTS Advanced Server Properties: "Enable Floating License Logging". This saves a log into the server logs directory as a CSV and has all details and user ids of license checkins, checkouts, extensions, etc. However if you need something from history right now and don't have the logs enabled already, then I am not sure. It seems like it might be there since you can run license utilization reports.