Apple Business Manager

Intro to user accounts in Apple Business Manager
Accounts in Apple Business Manager are manually created.
Each user account may have the following information associated with it, which can be viewed in the account list or when an account is selected:
Status
First, middle, and last name
Managed Apple ID
Role and location
Email address
After upgrading, your Apple Deployment Programs account names are changed in Apple Business Manager as follows:
Program Agent is called Administrator.
Administrators are called managers.
The accounts used to buy licenses of apps and books from the Volume Purchase Program become Content Managers with the continued ability to buy apps and books.
The accounts used to manage mobile device management (MDM) servers become device managers.