Thanks for the input, it is (1) Unity server VM only with (1) Msg Store server (Exchange off box). What do you mean by in place upgrade? Don't I have to wipe out the 4.0(4) build completely since they will be running on Win 2000 OS and 7.0 runs on Win 2003 OS?
I was assuming that you had new hardware. The existing 4.04 hardware would still be used until you are ready to cut.
Basically, DIRT export the database.
Rebuild the new 4.04 server Unity server, then DIRT import everyone to new server (windows 2003, etc).
Shutdown the old server.
Let it run for a couple days, then do an in place upgrade from 4.04 to 7.x. Granted, I have not looked if that path is acceptable to go from 4.04 to 7 directly. I assume you can.
If you wanted to use COBRAS, you can. Simply install the new 7.x server, home it to the Exchange server. Test everything out with CUCM, MWI, etc.
When you are ready, simply COBRAS export the subscribers out, and import them back into the server. But since they are on the same domain, you will have to delete them from the existing server. They can not reside on both Unity servers in the same domain.
I prefer to use DIRT with your example if I have new hardware.
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