So, in my last post I praised Microsoft. In this one I’m going to a little bit of bashing. Hold your applause. 
Those familiar with Exchange know that in previous version, an Exchange Admin user could log into another mailbox via POP3 or IMAP using the Domain\Username\Mailbox Alias. I was hoping to use this to then setup a IMAP storage for voicemails in Asterisk without having to know each users password. Alas, this is not possible with Exchange 2007. I don’t understand why they removed this feature. I have suspicions that it might be related to their own Unity Messaging solution (but I think that just because it thwarted my attempts of getting some of the same functionality without using their solution).