Hi Everyone. I'm really stuck with this so hope someone can help. We have a crashed Server 2003 that I can't get back on line that housed Exchange 2003. We are trying to install Exchange 2010 on a new server but it keeps saying it can't as there is already a server with Exchange 2003 on, which is in mixed mode and doesn't have service pack 2 installed. I can't bring this old server back online. It has already been demoted and removed from the network, all FMSO roles have been seized and I have gone through the article supplied by Microsoft to Forceably remove the Exchange server. I can't see any reference to it or Exchange anywhere in Active Directory, ADSiedit, sites and services and no services are running. All references have been removed from the registry too. Am I missing something? Can someone please help? Thanks in advance. Andy

Duplicate: http://social.technet.microsoft.com/Forums/en-US/exchangesvrdeploy/thread/682bf6a7-5209-4ec4-a3c4-c3822c2ec665/#682bf6a7-5209-4ec4-a3c4-c3822c2ec665Martina Miskovic

If I create a new forest will it be able to function with my current domain? I presume it will only need the new forest for the purpose of exchange so is it possible to put a trust in place between the two forests? What affect would a new forest have on my current network? Many thanks for your help. Andy

That is really helpful Fiona, Many, many thanks Andy

My pleasure. Have a nice day :)Fiona Liao TechNet Community Support