First and foremost, Outlook is a tool for accessing information from Exchange. Correct?  That's been the old standby definition whenever someone complains of their piss poor IMAP support. Reasonable definition, IMHO. We all know they need to make money.

Now, however, I run into the old problem of "You already have a Microsoft Exchange account set up. Outlook supports only one Exchange account at a time." Seriously folks. You want to sell Exchange Server licenses right? Why not open up Outlook to subscribe to multiple Exchange Server accounts. Then the whole world could use Exchange Server.

I know, there would be dozens of really nasty complexities and all that. This isn't a first generation product we're talking about here, though.