Iron Speed Designer-applications automatically log out application users after a period of inactivity. This feature guards against identity theft that can occur when a user leaves their web browser open to an application, and an unauthorized person uses that browser to extract identity information or perform transactions in the application.
After a period of inactivity, 30 minutes by default, the application user is prompted to sign in again to reaffirm their identity. You can change this default setting by adjusting the Timeout parameter in the SessionState section of your application’s Web.config file.
<SessionState
....
Timeout=’30’
/>
Set Timeout to the number of minutes after which the application should sign out the user.