You can have your devices added to Apple Business Manager at the time of purchase. To do so, you need to:
Share your Organization ID with the reseller.
Enter the Reseller Number for the Apple Authorized Reseller or the authorized cellular carrier you purchase from.
Enter an Apple Customer Number if you are purchasing from Apple.
Note : You can add more than one Apple Customer Number or Reseller Number.
There are two ways you can add Reseller Numbers and Apple Customer Numbers:
The first time you select Devices in the sidebar
By choosing Preferences > Device Management Service Assignment
Once a Reseller Number or Apple Customer Number has been added to your Apple Business Manager account, any new devices purchased from that reseller will automatically be registered and appear in your Devices list as long as the reseller has correctly assigned the devices to your Organization ID.
Once this process is completed, you may proceed to integrate Automatic Device Enrollment with JumpCloud.
For further details, please refer to the following article: