Session Timeout
From SmartWiki
The Sessions Timeout setting is found on the Global Configuration page, in the Login & Security Settings section.
This setting is used to control how long a user can be inactive in their browser before they are automatically logged out by the system.
The session timeout feature will automatically log out any user if their session remains inactive for the defined number of minutes.
Set the Session Timeout as required.
We recommend that you always set this option. Generally, 30 or 60 minutes are acceptable timeout periods.