Unity running on top of Exchange 2000 is being worked on for the 2.5 release but no date for RTP is available yet.
Terminal server support (for VMO and AA access on the client side I assume) is not planned at this point. I have heard from a couple of folks that they were able to get this working on WinFrame and the like but currently this is not a supported configuration. Please be sure to hit "Features@ActiveVoice.com" to make sure the marketing folks know this is something you'd like to see us spend resources on.
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