Terminal Services idle session time limit does not meet the requirement.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-3458	5.047	SV-16614r1_rule		Medium

Description
This setting controls how long a session may be idle before it is automatically disconnected from the server. Users should disconnect if they plan on being away from their terminals for extended periods of time. Idle sessions should be disconnected after 15 minutes.

STIG	Date
Windows Vista Security Technical Implementation Guide	2017-01-30

Details

Check Text ( C-39128r1_chk )
If the following registry value does not exist or its value is set to 0 or greater than 15 minutes, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: MaxIdleTime Type: REG_DWORD Value: 0x000dbba0 (900000) or less but not 0

Fix Text (F-34277r1_fix)
Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Terminal Services -> Terminal Server -> Session Time Limits “Set time limit for active but idle Terminal Services sessions” to “Enabled”, and the “Idle session limit” set to 15 minutes or less, excluding 0 which equates to “Never”.