I installed Exchange Server on a new server called "SERVER-MAIL", which was a member server in a domain. Before it went live I thought that the name "SERVER-EXCHANGE" might be more apprioriate - so I renamed it - and all hell broke loose.
I tried renaming it to the original name, but it was still screwed up.
In the end I had to format the disk - reload server 2003R2 and reinstall Exchange Server 2007 - this time under the SERVER-EXCHANGE name.
All appears good, except that when I go into the Exchange Management Console I now see 2 servers (the old and the new) - obviously the "old one" is still configured in active directory.
How can I safely remove it (keeping in mind that many of it's properties refer to databases of the same name and location now being used on the new live server).