Advance warning timing
Defines when a reminder that the session will expire should be shown to the user.
The Advance warning timing property defines when a warning message should be shown to the user informing them that the session will expire. The time is specified in minutes. For example, to display a warning 5 minutes before the user's session times out, you would enter 5 for the Advance warning timing setting.
When the warning message is shown, the user can click a button to extend the session.