sdo -
Yesterday was fun with searching. It turns out that yes, as of NBU 7.6.0.3, GRT is supported with Exchange 2013. However, we'll probably upgrade right to the most recent GA, 7.6.1.
We're running CU7 (not the failed experiment which was CU8 ha ha) on Exchange 2010 SP3.
I see your points about the changes in schema, etc, but man! It was a pain for us to go from Exchange 2003 to Exchange 2010 as they were totally incompatible in terms of restores. But it was a huge jump so I kinda get that. I'm hoping the move from 2010 to 2013 isn't so large...
Yes, any Exchange gurus please hop in.
thanks!
Michelle