When an employee quit they factory reset the device before handing it back in. Somehow this completely severed the link with Manage Engine. We cannot communicate with the device anymore. The device has been logged into and it doesn't have the MDM installed on it. I feel like this is a serious security breach if at anytime they can remove the MDM and tracking on the device and have a completely unlocked device!

We downloaded ManageEngine MDM app and its asking for a one time password that we never set up, when I click on the learn more about the one time password in the MDM itself it brings me to a webpage that is not found.

Is it possible to lock the ability to factory reset any of these devices? They are Ipads and enrolled to the MDM through Apple business (ABM).