moving domain PCs to a new office, with no local DCs

we are moving a couple of users to a new location that does not have a local domain controller on site
they are also going to be on a different network

example - the site they are currently at is setup on the following network-
it has 2 domain controllers
they will be moving their physical PCs to another office, which has direct access to the domain controllers at the other office, but they will be on the network

do i need to add anything to sites and services?  we wont be adding a domain controller just yet, but plan on it in the future.
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Seth SimmonsSr. Systems AdministratorCommented:
i would add the network to the same site as
there would be latency but if they can talk to each other, it should work fine
once you get a domain controller in the other place, just create the additional site and move the network there

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Ben HartCommented:
I dont believe you should need to do anything.  Provided the new office subnet can access those DC's, and that DNS works you should be good.  Are you able to test a single host before the move?
Chad FranksSenior System EngineerCommented:
different network, but same domain?  if its the same domain, then I would check to see if you can resolve the DNS name of the domain controller.  If you can, then authentication should take place. Are there any firewall's between the new site and the old one?
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No matter where you move client computers, the computers will try to authenticate with DC in site where you latch that computer IP subnet
However if that site DC is inaccessible and other site DC is accessible, computers will get authenticated to that site.
Better you latch computers IP subnet to site where client can access DC
You don't have to make any changes, as those machines will still be able to authenticate, but if you don't, your DCs will periodically log an event (can't remember whether it's an error or a warning) stating that they've received x number of authentication requests from machines in a subnet that's not associated with an AD site. The exact wording will be different, but you get the idea.

I'd go with Seth Simmons' recommendation above: create the new subnet object and map it to the site with the DCs. (If you've got DCs in more than one site, use the one with the best connectivity to the remote site.) When you do add a DC at the remote site, don't forget to move the subnet object.
Ben HartCommented:
OP you did not respond to any Expert suggestions.  What is the status of your problem?
For what it's worth, I think Seth deserves most of the points. My comment, which you marked as the answer, was mostly just me agreeing with him, with a little added info. If you want to split the points, that's fine by me, but he should get most of them, in my opinion.
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