Remote Desktop Services must be configured to disconnect an idle session after the specified time period.

From Windows 8 Security Technical Implementation Guide

Part of TS/RDS - Time Limit for Idle Session

Associated with IA controls: ECSC-1

SV-48097r1_rule Remote Desktop Services must be configured to disconnect an idle session after the specified time period.

Vulnerability discussion

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

Check content

Fix text

Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Remote Desktop Services -> Remote Desktop Session Host -> Session Time Limits -> "Set time limit for active but idle Remote Desktop Services sessions" to "Enabled", and the "Idle session limit" to 15 minutes or less, excluding "0" which equates to "Never".

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.