I am trying to install Exchange 2007 on a brand new Windows 2003 Server. I have gone through all preinstallation steps and am to the point where Exchange runs it's Readiness Checks to see if your domain is ready. That's where the trouble comes in.
One of the reasons I cannot continue with installation is because Exchange 2007 is reporting two instances of Exchange 2003 on our network.
One instance was on the very same machine I'm working on. I previously installed the 32 bit version of Windows Server 2003 and Exchange 2003. Then, realizing my mistake, formatted, installed the 64 bit edition, and am now trying to install Exchange 2007. In other words, Exchange 2007 setup is reporting an Exchange 2003 server on the network that does not exist, not as a physical machine or as an installation. I have no idea where it's pulling this information from, as I've searched the registry on our DC.
The second instance is on a server we have here which someone has attempted to install Exchange 2003 on at some point in the past. There is an entry in Add/Remove programs, but it is not actually installed, thus cannot be uninstalled via Add/Remove programs. The Exchange Server Management tool does not exist on the machine.
This brings up another issue. Exchange 2007 setup is reporting that I need to switch the Exchange organization into native mode. This (from my understanding) must be done from the Exchange Server Management snap in. And as I just mentioned, neither server that is being reported to me as an Exchange server really has Exchange installed.
I cannot continue with Exchange 2007 installation without doing something with these "rogue" servers. I have searched online, searched machines, searched the registry, rebooted, and otherwise done everything I can to get rid of these machines.
Does anyone know where the information about prior installations of Exchange 2003 would be kept, or how I can get around this issue?
I know this is somewhat confusing...if you need more information or screenshots, please feel free to ask.
I really hope someone can help me with this.