Yes they do have snap manager but backups mostly keep failing.
With exchange 2010 you have database, mailbox, and item level redundancy and protection so I don't actually see the value.
S
you can have whatever redundancy you want, and maybe even lagged copies, but if you need to restore something months older, you still need backups..
Exchange does not needs NetApp HA capabilities if you use multiple copies of database.
In our case NetApp sold snap manager for 30 remote copies of already triple redundant (one remote copy) database and then tape backup at month end.
In my view they just fooled the unsuspecting customer and just oversold everything.
That was fine too if it would have worked.