Problem facing the un-installation of Exchange 2007 Ghost Server.

I have migrated AD and uninstalled Exchange 2007 mail server. It was uninstalled from my customer’s organization. I will explain with example. There is a mail server named ‘DEF’. I have installed New Exchange Email Server 2007 in the child domain. I also named the server ‘GHI’ which is different from the original. However the public folders are not working. It was still looking for the ‘DEF’ which is the old reference. How can I remove the ‘DEF’ reference? I think you have now got the problem. If anybody knows the solution to this, please help me. I will be thankful for all your help.
