We are getting ready to put up two Exchange 2010 servers in our environment to begin migration from our current Exchange 2003 Mail Server. The question I have is this: Is it possible to install both of these servers into the current Exchange environment prior to actually moving any users and/or routing email through them? Basically we would like to have everything ready and then schedule a short outage on a Saturday morning to switch over mail routing and OWA. Is it possible to do this?
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