Hi,
We just added a Signed License key to a Qlikview environment and it doesn't show the latest timestamp of usage for a Professional or Analyzer user in the tabs where they are added. So you have to go to the Server Event Logs or Session Logs to see if the user has the right license. Also in the User -> User Management -> CALs tab there is the type, but not a timestamp for last login, only N/A.
It seems natural an logical to see the last used date/timestamp for a user in the License Professiona/Analyzer tabs where they are added as a user.