We have two 2008 domain controllers at our main data center. We have a 2003 domain controller at one of our branch locations. The DHCP server at the branch location is set up to assign their local DC as the primary domain controller. However, we are noticing that this domain controller is being referenced by Outlook throughout the company. When users open Outlook they are forced to wait as the branch office DC is contacted.
I believe this may be due to the controller being in rotation for AD lookups. However, we can not have this take place as it is very inefficient to do AD lookups to remote locations. So my questions is, how do I set the DC's so that they are only utilized at their proper locations. i.e. the branch DC is only used at the branch location.