This is for a Windows environment

Your recommendation

Now i have all this runing on the same server

have more Clients coming in. need to run on Different servers

how do i do this ?

DNS - Server 1
Web - Server 2
Mail - Server 3
Sql - Server 4
FTP - Server 5

Active Directory, Domain Controller - do i need a Different Server

Need to setup in right way so if we need we can add
more servers For web, DNS, Mail, SQL, FTP

Books, web site, or Your recommendation

thx
sam