With regard to the issue of domain

I have this problem a long time, I also do not understand that for a long time, I do not know here who can help my Daisen,
that is the case, we now have more than 100 computers, like the formation of a domain, my train of thought that is the case .
1.to build the main domain, and then the following sub-branch of the domain is the file server, print server, mail server, users and services as well as the ERP server, where you say in advance, our company is to use a so-called network terminals , That is what I set here on the reasons for server customers, these computers are added to the main domain,
question is, are added to the main domain, my domain-user server to access another son Domain of the document file server is also not able to set user rights, privileges, as well as departments nTFS those attributes you?
Help me my big brother

set up your server's time to add them to set up sub-domain when the right-click authority has set up ah! Is your ftp or IIS, said that careful