Remove Non-Existant Exchange 2003 Server

I need some help cleaning up my Exchange 2003 infrastructure.  Our Windows Server 2003 domain consists of 1 DC, 1 member server that is also the one and only Exchange server on the network, and a handful of workstations.  This issue that I am having is that System manager on the Exchange Server shows that there are two Exchange servers.  One of them is the Exchange Server that exists now and the other is one that existed sometime in the past and may have just been disconnected from the network and it has never returned.  Right now the performance of the existing Exchange system is OK.  Everybody can get their email.  The calendars and shared contacts work.  But I would like to get things cleaned up.  When the other Exchange server was removed, isn’t there a procedure that you should follow to gracefully remove it, similar to the procedure that you use to gracefully remove a DC?  I don’t think that was done.  Is there a special method I should use to remove the non-existent Exchange server from System Manager?  Thanks in advance for your help.