Authorizing a DHCP Server

[Tripredacus]

I have found instructions that allows me "To Delegate ability to authorize DHCP servers to a non-enterprise administrator" on Tech Net.

The Domain Controller has its DHCP disabled (but will only use it for network service boots) and the Proxy Server is running DHCP for the LAN. The Proxy Server is not a member of the domain, so I can't ever find it to authorize it properly.

Is there a way to create an alias to a non-domain computer so that I can give it security permissions? Is making the Proxy Server log into the domain the only way to do this?