InformationSet Sleep setting to 1 minute of less.
You should set inactivity timeout to avoid unsanctioned usage of the device if you leave it unattended. The inactivity timeout not only blackens your screen after stipulated time period but also kicks in other security features such as screen lock that protect your device when you leave it unattended.
SolutionFrom the MobileIron console, open the Policies & Configs -> Policies view. Under the Security Policy verify that Maximum Inactivity Timeout is 1 minutes.