When you choose to create new users with SSO, they are created as Sisense users instead of Active Directory users. 

This renders the functionality rather useless, as you can't then share dashboards with an AD group and have the new users gain immediate access.

It should either by default, or with an option, create new SSO users as Active Directory users.

This way licenses only need to be consumed when a user actually logs on and the user creation process becomes automatic.