Disconnect the SCIM connection in Apple Business Manager
If you are no longer using the SCIM connection or you want to change the Apple Business Manager accounts to manual accounts, you can remove the SCIM connection between Azure AD and Apple Business Manager.
Disconnect the SCIM connection
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 Data Source below Organisation Settings.
Tap Edit next to SCIM, then tap Disconnect.
Read the warning about disconnecting, then tap Disconnect.
Turn off Provisioning in Azure AD.