I'm looking for some "best practice" information about putting our iOS devices into Device Groups vs User groups and enrollment into groups.

* Is it best practice to build a new group for every textbook deployment or specialized app deployment? Seems like groups might get out of hand quickly.

* Is it possible to email an enrollment request to a list of users and have those devices auto join a group on enrollment?

* Not all of our BYOD devices are named in a sensible fashion. What is best practice for finding the devices that you wish to enroll in a group? Is it best to look up by serial number?

* Why would we want to use user groups vs device groups?

* Can we import users so we don't have to create them manually?