Hi, > As a best practice, you should not run Exchange 2003 on servers that > also function as Windows domain controllers. Instead, you should > configure Exchange servers and Windows domain controllers separately. > > However, if your organization requires that you run Exchange 2003 on a > domain controller, consider the following limitations: Running Exchange on a DC is not only supported, it is a "normal" situation for many small businesses that are using SBS (Small Business Server). There is nothing fundamentally wrong with this setup. In fact, one could argue that it is amazing that you insist on requiring two physical servers (minimum two, maybe three if you also insist on FE/BE) for supporting 20-30 little email accounts in a small organization! best regards Mike