I have been running ABM to synchronize devices for some time now, but in recent days, when using the interface for synchronization, the response from the interface to the device's' Device-Assigned-by 'field has changed. The official website should return' The email of the person who assigned the device. 'However, what I received was a string of numbers, such as 275xxxxx, which corresponds to the ABM user's ID. Some devices may change the field to email again when synchronizing, but unfortunately some devices will always have these numbers. How can I recover the email?

I have been running ABM to synchronize devices for some time now, but in recent days, when using interface synchronization, the device's "assembly_assigned-by" field responded by the interface has changed. The official website should return "The email of the person who assigned the device." However, what I received was a string of numbers, such as 275xxxxxxxx. Some devices may change the field to email again when synchronizing, but unfortunately some devices will always have these numbers. How can I recover the email? https://mdmenrollment.apple.com/server/devices https://mdmenrollment.apple.com/devices/sync