Based on the Requirements that you cited (and I confirmed on www.ciscounitytools.com): "Requires Unity 3.1.0(1) or greater, running in a Microsoft Exchange 2000, Microsoft Exchange 2003, or Microsoft Exchange 5.5 environment. ",
what you need is either Exchange 5.5, Exchange 2000, or Exchange 2003.
Since Exchange 2007 is not listed, it looks like it's not supported. I do *not* know whether or not changes will be made to MSM to support Exchange 2007.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...