Agreed, but the MAPI/CDO client package is available as a free download. It's generally listed as a prerequisite for any application that requires it.
Not that much of an inconvenience, really.
powershell uses UTC with an offset for the locale; however, you can remove the offeset if you wish and retrieve UTC only; you can even apply unix-style formatting if you want.
Powershell is pretty friggin awesome once you scratch the surface...
Exchange isn't an applications platform, and isn't billed as such. It's Groupware, period, full stop.
That's not to say that Exchange 5.5 wasn't billed as an apps platform, but that was 10 years ago. Things change, and your anecdote from 1998 can't possibly be expected to reflect the current state of affairs.
For what it's worth, Exchange can interact with external applications through the use of the Exchange Web Services API, which is a little difficult to grasp at times, but it's well documented on MSDN. We've developed several custom applications around the calendar interface in very short periods of time.
You're both correct, sort of.
Evolution uses Exchange Web Services to gather calendar data, and IMAP for messages.
There is, however, a MAPI add-on available, but the last time i checked it only worked with Exchange 2003. The IMAP+EWS combination works well, and is implemented in other mail applications - for example, the Mail app that comes with OS X.
get-mailboxstatistics -identity username | select identity,totalitemsize
You could even script the two together, to identify mailboxes larger than, say, 1 GB and then export items older than 180 days...
$enddate = (get-date).AddDays(-180)
get-mailboxstatistics -resultsize unlimited | where-object{$_.totalitemsize -gt 1GB} | export-mailbox $_.alias -enddate $enddate -targetmailbox foo -targetfolder bar
Seriously, RTFM.
To further address your concerns about client compatibility...
Instead of using MAPI, which is admittedly a flawed and convoluted protocol, many mail clients are being developed to take advantaged of Exchange Web Services. The Mail app that ships with most versions of OS X uses IMAP to fetch mail from Exchange, and Exchange Web Services to work with the calendar. I believe that Evolution does something similar.
In the future, you'll see these same clients start to use EWS for mail as well. The newest version of Entourage will use EWS exclusively when dealing with Exchange servers (until recently, it used a MAPI implementation).
It seems intuitively obvious to me, which means that it might be wrong. -- Chris Torek