Delete mobile device management (MDM) servers in Apple Business Manager
You can delete a mobile device management (MDM) server and reassign or unassign devices that are currently assigned to it.
Important: If a server that has devices assigned to it goes offline instead of being deleted (for example, due to a network issue), devices associated with that server are managed with the last known configuration until they are assigned to a new server or erased and reactivated.
Delete mobile device management (MDM) servers
In Apple Business Manager , sign in with an account that has the role of Administrator or Device Enrolment Manager.
Tap Settings at the bottom of the sidebar, select your MDM server under the MDM Server list, then tap Edit.
Tap , then do one of the following:
Select the MDM server that the devices will be reassigned to, then tap Reassign & Delete.
Select None from the MDM server list, then tap Unassign & Delete.