Hi, We currently have Exchange 2000running on our W2k domain server. We are building a new W2003 server and installing Exchange 2003.The W2k will remain the domain controller andexchange will be removed. The non domain controllers are in the "Computers" group and, not to state the obvious, the Domain Controller is in its own group "Domain Controllers" I have been doing quite a lot of reading and thought I saw something about the non-domain controllerservers needing tobe in their own group or OU but I cannot find where I saw it.Does this sound familiar to anyone, and if so, is this a "Must Do" or a "Suggestion". Thank you, SNH