AD authentication and importing users from AD into FreeNAS-9.10.2-U4

OK having trouble configuring Active Directory authentication with FreeNAS.

I have a domain name, service account and password set.
I can browse files on a SMB share I created

I want to see users and groups from active directory so I can control permissions. I can only see built in users and groups right now.

Suggestions?

View attachment 19540