We're installing an SBS server for a customer who currently does not have any other windows servers. The server will be used for quite a few functions: outside web site, intranet site, email (Exchange), and some file/print sharing. Some people recommend using mycompany.local for the AD domain, others recommend using the registered Internet domain of mycompany.com. I've not heard convincing reasons one way or the other. I'd like to know more of the pros and cons of each. In the past, we've used the registered .com name.