Reference Guide
...
RDP Proxy
RDP Session Settings
RDP Idle Time Settings
1min
To calculate idle time for RDP Connections in a defined time limit, follow these steps:
- Navigate to Administration > System Config Man.
- Set the parameter: nsso.remote.desktop.idle.threshold = “millisecond” (time limit to start the calculation of idle time)

Idle Time Configuration
If the nsso.remote.desktop.idle.threshold property is not set in the System Config Man, the default value is set at 30000ms (30seconds).