You can define the maximum idle time for a user in seconds (applies only for SAP GUI connections). The default value is 0 which mean no time out for a user to stay in the system. You can set the time to automatically kick off user from the SAP system if the time is exceeded. To enable this, go to transaction code RZ10. Tick on Instance Profile and select Extended Maintenance. Scroll to find below profile parameter.
rdisp/gui_auto_logout
Restart the instance to apply the changes.
