So there is a Windows 2003 Server SBS with an Exchange server 2003. I have recently added a second server (Windows 2008 Server R2) as a second DC, DNS, DHCP. This second server will eventually replace the original win 2003 server i.e win 2003 server will
be offline. So far so good. Now I want to add another Exchange server which is Exchange 2010 to the same domain. First of all, is it possible to have both exchange 2003 and 2010 at the same time in a single domain? Second, if it is possible, how to transfer
all data and configuration from the old exchange to the new one? Third, I want to have them in a way that if one goes down (exchange server 2003 will be later on), the event would be transparent to users. Forth, what about certification and web access consideration?
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