>We want to install SQL 7.0 on NT 4.0 server.
>
>When we instal NT 4.0, we should select this server should be a Primary domain server, a backup domain server or a member server.
>
>Which one should we select?

Hi Jim

The first installed NT4.0 Server becomes Primary Domain Controller (PDC) and if you have more than one server, you can register new NT4.0 as a member server or if you will use as a backup server as that option.
If this is the first NT server in the firm, you have to set up it as PDC.
I have not tried to install SQLServer on a backup server, but you surely can install it either on a PDC or on a member server.