Unable to connect to Exchange Server 2010

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http://serverfault.com – I recently setup a new Exchange 2010 Server and when I go the Management Console it tells me that it is unable to connect to server. Currently it is displaying the wrong domain. Is there a way I can change the domain? Or do I have to remove the Active Directory Role. I tried to use Remove-AcceptedDomain -Identity "domain" but that didn't work. Console gave me an error saying that it was not recognized. What I am trying to do is create a mail server that I can accept and send mail and access the mail from outside the domain. Basically just a mail server, no other computers will be connecting (HowTos)