InformationThis control determines whether a password is required before allowing access to the device via the touch screen. By default, iOS devices do not require a passcode to unlock the device after a period of inactivity, and the default Exchange ActiveSync policy setting applied for users not assigned to a mailbox policy does not require a passcode. It is recommended that a password be set.
SolutionFrom the MobileIron console, open the Policies and Configs -> Policies view. Under the Security Policy verify that Password is set to Mandatory.