Pardon me if this question has been answered before, I asked in the W2K8 forum and got referred here. According the Exchange 2007 team's blog an in-place upgrade from E2K7SP1/W2K3 to W2K8 is not supported. They recommend a clean installation of E2K7SP1 on a W2K8 server and then move the mailboxes. Additionally, if the legacy E2K7SP1/W2K3 environment is clustered and entirely new E2K7SP1/W2K8 cluster must be built and the mailboxes subsequently moved. If this is the case it is going to present some of my customers with some interesting choices. Are there plans to correct this either in Exchange or W2K8 or both?

I would not think that this recommendation will change. If someone is going to deploy Exchange 2007 SP1 on to W2k8 servers there are new options such as the new clustering model that will be able to be utilised. This will add a lot of value to Exchange deployments, especially clustered systems, and will change the Exchange design best practices. The current recommendation for W2k8 to put in a parallel environment system and move mailboxes is the same as the upgrade path from an Exchange 2003 to Exchange 2007 cluster which sounds appropriate. I guess you will not have any real definativeanswer until Exchange 2007 SP1 is released or maybe when W2k8 ships next year. Cheers, Rhys

I agree, I don't see this changing. It will be a case of swing migration rather than in place. Cheers Nathan