I have an old server on which Exchange 2003 runs. I want to change the server itself without affecting Exchange data and access. I have a zero downtime constraint. Is it possible to prepare my second server, and launch some kind of replication with the other. And finally, when this replication is finished, I would just have to powerdown the old server. All this is transparent for the users. Is this scenario feasible ? Has someone some experience to share on this question.