'User Detail' report under 'Administration Reports' will give the information, however in order to narrow down the report search to only show the active users, we need to use the User Filter and set it to show enabled users.
Below are the steps:-
Login to Replicon.
Click on ‘Reports’ tab from the top menu.
Scroll down to 'Administration Reports' section.
Click on ‘User Detail’.
Click on ‘Settings’ in the report.
Go to the Filters tab.
Enable the User filter.
Enable the User Name under Columns
Click on the User drop down.
Select Enabled for Login status.
Select < All >.
The report now will list all the Users who are active.