Have Unity 4.x -- never installed. When install time came, Exchange system had been upgraded to 2007 in new AD Forest. Is there a better install path than--
a. Install Unity 4 against Exch 2003
b. Upgrade Unity 4 to Unity 5
c. Swing Unity 5 to new forest
d. Attach accounts from new Exchange server
This sounds ugly and seems to have lots of intermediate missing steps in it. Is there a way I can use the 4.x license and the 5 upgrade license to initially install in Exchange 2007 forest?
If not, can you point out any 'gotchas' to watch for?