So I got the SSO to show up by backing out of the 1st account creation. However; now I got a "The single sign on extension could not validate the domain" error. The same SSO profile works as expected when logged in so this has to be a bogus error.

Updated to Beta 8 and re-enrolled. The SSO sign in was skipped again. This time I backed out of the first user creation and SSO initiated however now I have this error: The single sign on extension could not validate the domain The same SSO profile works when used with a logged in user account so this error during setup assistant doesn't seem to be valid.