I’ve been looking into getting BlackBerry Enterprise Server installed with a single Microsoft Exchange Server organisation. While it is by no means difficult, it is also not that easy either. By that, I’m referring to the hoops that you have to go through to get the two systems to talk to eachother. For example, the creation of the BlackBerry Enterprise Server service account needs to have local server rights for authentication, and Send As rights in the Exchange Mailbox store to sent the email over the network.
Microsoft have been a big advocate of macros and wizards, and I don’t see how difficult it would be to run a wizard to check the current configuration, and make these modifications. The only problem that I see with this is that it may remove the ‘black art’ status that BlackBerry environment has gained. Thus far, I’ve not had any experience with the instant messaging components of the BlackBerry product suite.
I’m an avid 
user and am loathe to commit to another IM application. However, as a corporate IM solution, the BlackBerry handhelds are a great medium if you’ve already embraced the technology for email. At some point I’ll extend the BlackBerry infrastructure to test the IM features.
