A client had to roll out 100+ laptops and choose Intune for this. It wasn’t certain who was getting what laptop so the choice was made to use an admin account to enroll the devices before giving them to the user.
Intune has a Enroll Limit of 15 so after 15 you start having issues
In Intune you can actually setup Device Enrollment Managers who can actually Enroll 1000+ machines
In Intune in the Azure portal, choose Device enrollment > Device enrollment managers.
Select Add.
On the Add User blade, enter a user principal name for the DEM user, and select Add. The DEM user is added to the list of DEM users.
https://docs.microsoft.com/en-us/intune/device-enrollment-manager-enroll