>>Update to previous post:
>>
>>I've been keeping part of an eyeball on potential Exchange replacements for some time. The sense I get is that nothing matches the capabilities of Outlook+Exchange, it's one of MS's crown jewels in the enterprise space.
>>
>True. Some people over here think it is the last real jewel of large worth (Studio and SQL server not forcing people like Outlook does).
>But MS gives the data before encrytion to NSA - here I believe Snowden more than prepared statements from MS.

Yes, and that's a huge concern for migrating to the cloud. Financially it makes more and more sense to go there for messaging, but at what security cost?

The foot is even known to be in the door with Blackberry: http://www.theregister.co.uk/2013/07/11/blackberry_gives_indian_spooks_access/

More reasons to consider on-premise solutions...