It would be nice to have a command to quickly find out how many licenses are in use.
With `tlctl session list` you can get the total number of sessions right now and for most systems, this is equal to the number of used licenses. But this is not always true when, for example, allowing multiple sessions per user.
We don't currently have any convenient way to get license usage. tlwebadm only has the graphs, and no textual information. The only way is to dig around in the log files at the moment.
It is now possible to list sessions with tlctl (bug 425) which gives a summary at the end over how many sessions were listed. This summary should in theory correspond to the number of licenses used but without any documentation highlighting it, this might not be clear to the user.