This policy only takes effect when the policy SecurityTokenSessionBehavior is set to LOCK or LOGOUT, and a user who authenticates via a smart card removes that smart card. Then, this policy specifies for how many seconds a notification which informs the user of the impending action is displayed. This notification is blocking the screen. The action will only happen after this notification expires. The user can prevent the action from happening by re-inserting the smart card before the notification expires. If this policy is set to zero, no notification will be displayed and the action happens immediately.