This is a good question that seems to pop up quite often. Of course, up to CCM 5.x licensing is really honor based so there is no report that you can query that will give you this info. Have a look at the following threads that go over this in some detail. Sankar really explains this very well!
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...