Authentication for 7-mode

So i have set up authentication in cmode FAS using the commuties help(Thanks to all contributors in the community.) using a domain tunnel and using the security login create command.
Nowmy AD users areable tologin using their credentials and specificrights has been provided to the group.

Now i want to implement the samething in 7-mode FAS.
Where i want users to login to the filer using their domain\username and password and makechanges as per their permissions.

I tried the useradmin domain user add domain\user -g "Backup Operators"

but it didnt work.

Is there anything else which i need to do? Or is there any documents which might help me in this configurations.