Disconnect federation from a domain in Apple Business Manager
If you no longer plan to use federated authentication with a domain, you can disconnect a domain from Apple Business Manager. This process will not affect the domain verification.
Note: You cannot disconnect from a federated domain if Apple Business Manager is in the process of enabling federation or resolving conflicts with other Apple IDs.
Disconnect federation from a domain
In Apple Business Manager , sign in with an account that has the role of Administrator or People Manager.
Click Settings at the bottom of the sidebar, then click Accounts below Institution Settings.
Click Edit next to Domains, then do one of the following:
If federated authentication is enabled, turn it off, then click OK.
If federated authentication is not enabled, click Disconnect, then click Disconnect.