Sign in on Shared iPad with Apple Business Manager
The Shared iPad sign-in process differs depending on how you’ve configured Apple Business Manager. If you use federated authentication with Apple Business Manager, the user enters their Azure AD user name and password. For user accounts that were created manually, the user enters their Managed Apple ID and a temporary Shared iPad passcode generated in Apple Business Manager.
Sign in to Shared iPad with federated authentication accounts
There is one option for signing a federated authentication account into Shared iPad:
Basic sign-in: The user enters their Azure AD user name and password.
The user then creates a Shared iPad passcode or password.
The next time the user signs in, they do so with their Microsoft Azure AD user name and new Shared iPad passcode or password.