User sessions can be terminated based on idle time. To set a timeout limit:
Navigate to Administration > System Config Man > Add New System Parameter on the Kron PAM Web GUI.
Set the following parameters:
rdp.idle.session.timeout= 5 (means 5 minutes)
rdp.idle.session.timeout.warning.before.min = 2 (means 2 minutes)
The rdp.idle.session.timeout.warning.before.min parameter decides when the pop-up will be displayed for the user.