netsysllc wrote: » Okay so for Active Directory your internal domain should have nothing to do with the outside world. Active Directory requires Active Directory integrated DNS and will install the services when you setup your domain. For your DHCP do not use your ISP or any external dns servers unless you want the heartache of diagnosing issues and wondering why AD does not work properly. The AD DNS can resolve to root hints or outside DNS and pass the result to the network clients for resolving external domains. Maybe start off with some light reading AD DS Design Guide