We are migrating over to an entire new setup and everything has been going fine but now devices are no longer checking in. If I wipe a device and re enroll it starts to check in without issue but my nightmare now is I will need to do this on 500 other devices. The still show enrolled and communication was working but now they are dropping like flies, but its only the apple devices. Android phones are still checking in without issue, apn is good until 2020 and each ' profile' that is linked to a mdm server on dep are not expired either. Nothing in the troubleshooting logs either, shows bytes sent then just stops.