If you set the DHCP server to assign a scope to a set of machines within Active Directory, that is what it will do, it wont work outside of those constraints
Step-by-Step: Configure DHCP Using Policy-based Assignment < all on technet. Everything you need. You really need to work on your google searches!
However, from the linked article:
The DHCP server determines the scope to which a DHCP client belongs based on the gateway IP address of the relay agent or the interface of the DHCP server on which it receives the DHCP client packet. Once the server determines the client scope, the server evaluates the DHCP packet against the policies applicable for the scope in the processing order specified. The policies applicable at a scope are those configured at the scope and those inherited from the server. A single client request can match multiple policies.
you can set the policies to pick the machines within an OU for machines. I learnt this in college, so if I am remembering badly, then fair enough I am happy to stand corrected.
Edit: DERP! Looks like I'm an idiot. :) DHCP MMC on a Windows 7 machine is quite obviously not going to do it is it localzuk?! *slaps face*
However, that feature doesn't link to AD or OUs.
Is it possible someone could reply with a network layout diagram so I can see how the aforementioned items are supposed to connect together. Network diagram as per a google search but obviously not relevant to what I am after
Stack Overflow Network Configuration « Blog – Stack Exchange
did you not see my post?