Apple provides ABM Administrators the ability to change the address associated with a Managed Apple ID (MAID henceforth for simplicity). When this address changes, do we need to do anything as an MDM manufacturer to account for this?
As the MAID is part of the enrollment profile, is there a set of checks that handles this gracefully?
When the device needs to re-enroll after a year, do we include the new address in the response? How should that be accounted for?
When replacing the MDM enrollment profile after a MAID username change, specify the new username in the new profile's ManagedAppleID field.
You should be aware of a race condition. Changing the MAID username is a server-side change on the account. The device will react to that change and display the updated username in the details of the MDM payload in Settings. Before the device knows about the username change, the replacement enrollment profile will have to use the old MAID username, and the new MAID username after.