I'm using Graph API to add new B2C users, since I'm using custom CX experience based on SignUpSignIn. Signing up is disabled in the B2C tenant as it must be initiated from our inhouse app.
I can add users successfully but all users are added to the main tenant's AAD. Admittedly, when I use PowerShell to search for these users, they don't show up. But they do in the Portal and I'd like to avoid that - constraining it to actual employees rather than hundreds or thousands of B2C users. Is there a way to add them ONLY to the B2C directory - which has its own tenant ID. Do I need to create another AAD directory and link this tenant to it?