MDM stands for Mobile Device Management. When a business or educational institution purchases a batch of devices from Apple, they will often enrol them in a program which allows the organization to add restrictions to all their devices and essentially have authority over them all. With MDM active on your device, you won't be able to activate it without permission from the supervising authority. Therefore, checking the MDM status has become just as essential as the Find My iPhone status.

Sample:

Case 1: MDM Locked
Model: MACBOOK PRO (13-INCH, M1, 2020) SILVER [MACBOOKPRO17,1]
Serial Number: ************
MDM: ON
Name: BRUT
Address: LA CITE DU CINEMA, 20 RUE AMPERE, SAINT DENIS, ILE-DE-FRANCE 93200
Phone Number: +33 # ## ## ## ##
Email: support@XXut.mXXa
Magic: ********************************
Department: BRXX TXXH
Address Line 1: XX CXXE XXXX
Address Line 2: 40 XX XXXX
City: OXXX
ZIP: XXXX
Country: XXX
Support Email Address: XXX
URL: XXXX
Is Supervised: TRUE
Allow Pairing: FALSE
Is Mandatory: TRUE
Await Device Configured: TRUE
Is MultiUser: FALSE
Auto Advance Setup: FALSE
Management Protocol Version: TRUE
Skip Buddy Items: Siri; DisplayTone; TOS; Payment; iCloudDiagnostics; Accessibility; ScreenTime; AppleID; Privacy; iCloudStorage; Restore

Case 2: No MDM Profile
MDM Status: OFF