By default, Pega Operator Id's are always active even if the user is not active anymore.
To enforce a user id to become inactive after a certain time, you can use the disablement policy under Pega Security Policies. You can manually disable an operator if you have the information about the operator.
If you just want to pull inactive user information based on when they last logged into the application, do the following:
1. Create a Report in "Data-Admin-Operator-ID" class.
2. In the report, add columns like "pyUserIdentifier","pyUserName" and "pyLastSignOn".
3. The last column will give you the last logged in time of the users.