We currently have a company who has an email domain of bob.com. Their email is setup to use a pop3 email connector to download the email. They are wanting to change the domain of the email to sue.com. They want to be able to totally change over to sue.com and just have bob.com forward email to sue.com. Of course this means send and receive as sue.com. What are our options of changing the domain over to the new one? Does the exchange tie the bob.com domain to active directory so that you can't change it?