Your first question was answered recently, and is also in the documentation:
There is an also option to enable Historical License Usage. It is referenced in the same guide, in Chapter 2 as well.
"The following read-only forms provide data for flashboards so that they can display current and historical license usage:
- AR System Current License Usage
- AR System Historical License Usage"
David J. Easter
Product Line Manager
BMC Software, Inc.
Is it possible to report on the number of users logged in Remedy from a particular date to an end date?