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 won’t affect the domain verification.
Note: You can’t 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.
Tap Settings at the bottom of the sidebar, then tap Accounts below Organization Settings.
Tap Edit next to Domains, then do one of the following:
If federated authentication is turned on, turn it off, then tap OK.
If federated authentication isn’t turned on, tap Disconnect, then tap Disconnect.