Apple offers a Device Enrollment Program (DEP) for mass provisioning and managing iOS and Mac OS devices for enterprises. DEP helps to simplify the initial setup and provisioning of devices in enterprises. Also, it makes the Mobile Device Management (MDM) enrollment a Zero Touch process. Apple Business Manager (ABM) portal help to manage and configure all the DEP devices across different MDM provider under a single portal.
Its always required to sync the Apple Business Manager (ABM) portal with the SureMDM account to ensure that any changes made in the ABM portal related SureMDM server get synched with the SureMDM account. Whenever MDM admin assigns any new devices to the sureMDM server or unassigns the device from the SureMDM server should replicate this information to the SureMDM account/console.