You need to define the MDM server and obtain a valid DEP token from Apple Business Manager to establish communication and manage device enrollment.

• To perform this task, you must have an Apple Business Manager account (created through deploy.apple.com using your company email address) credentials with Apple Device Enrollment Manager user role.
• You must have the public key associated with the MDM server.

To define a new MDM Server and obtain a valid DEP token from Apple Business Manager, complete these steps:

1. Login to Apple Business Manager Portal using an ID with Device Enrollment Manager role.
2. Click Settings at the bottom left of the screen.

 

3. Under MDM Servers in the device management settings section, you can see a list of MDM servers that are already defined. To define a new MDM server, click Add MDM Server.

3. In the next page, do the following:
   1. In the MDM Server Name text box, enter the FQDN of the target MDM Server.
   2. Deselect the Allow this server to release devices check box. Note: Once released, a device cannot be re-instated and so can never again do a DEP enrollment.
   3. Under MDM Server Settings > Upload Public Key, click Choose File.
   4. Locate the public key in your file system, select it, and click Open.
   5. Once the certificate is uploaded, click Save in the bottom right of the screen.

Now, the server has been defined.