Specifies a time limit for active Terminal Services sessions. You can use this setting to specify the maximum amount of time ...

"Specifies a time limit for active Terminal Services sessions. 

You can use this setting to specify the maximum amount of time a Terminal Services session can be active before it is automatically disconnected.

To use this setting, select Enabled, and then select the desired limit in the Active session limit drop-down list. By default, Terminal Services allows sessions to remain active for an unlimited time. 

If the status is set to Enabled, Terminal Services ends active sessions after the specified amount of time. The user receives a two-minute warning before the Terminal Services session ends, which allows the user to save open files and close programs. 

If the status is set to Disabled or Not Configured, time limits for active sessions are not specified at the Group Policy level. However, an administrator can specify time limits for active sessions in the Terminal Services Configuration tool. 

Note: This setting appears in both Computer Configuration and User Configuration. If both settings are configured, the Computer Configuration setting overrides. Active session limits do not apply to the console session. To specify user sessions to be terminated at time-out, enable the "Terminate session when time limits are reached" setting."