Hi -
If you don't see Exchange 2007/2010 offered in the Message Store Configuration Wizard, I'm sure this has something to do with inadequate permissions or the exchangemapicdo is not the correct version. Take a look at this doc, which you may have already seen, but review to make sure you:
- Ran the updated version of the Unity permissions wizard
- Have the correct exchangemapicdo file (not the one that comes on the Unity CD)
- Have your Exchange server at correct service pack/rollup and have performed the necessary permissions.
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/7x/using_exch2010/usingex2010withcu7x5x.html
Hope this helps!
Ginger