You can enroll Mac MDM devices to a zone either via ADE/DEP or OTA. Any Mac device that already exists in zone as a ZENworks Agent only device, can be enrolled again via MDM and it reconciles to the existing device present in the zone.
NOTE:
To enroll any Mac MDM device via DEP which is already enrolled as ZENworks Agent then the device has to be reset.
The Mac MDM devices can be enrolled using either the Apple Device Enrollment Program (DEP) or Over The Air (OTA). Do NOT use both DEP and OTA enrollment methods on the same device.
This section explains the manner in which Mac MDM devices can be enrolled in the zone. The topics discussed are as follows: