Create new AD Manager User with AD Manager Authentication

Create new AD Manager User with AD Manager Authentication

I want to create a new user account in AD Manager Plus which uses AD Manager Plus authentication.  When I click the + to add user, I can only choose from my active directory domains.  Are we not allowed to create new user accounts using AD Manager Plus authentication as an option?

...or am I missing an obvious check box somewhere?

Thanks

                New to ADSelfService Plus?