Some stunning reports out of TechEd from Ferris (Thanks, Rob and Bill).  I'm also digesting the IBM team's reports from TechEd, some real surprises -- like, what happened to that customer success panel anyway?  More on that later.  In the meantime, Ferris says --

"Upgrade BlackBerry Enterprise Server Before Exchange":

We hear there's a subtle bug that can cause strange effects when upgrading a mailbox store to Exchange 2007. It seems to be connected with the use of BlackBerry Enterprise Server (BES).

Here at Tech-Ed, we heard from two IT professionals that some of their Exchange users' mailboxes became "invisible" after a migration to Exchange 2007. This appeared to be connected with the use of BES -- the only users affected were those who used BlackBerrys.
No concept of customer-controlled migration planning here... especially not when you read this second one...

"Microsoft Doesn't Support Mixed 2003/2007 Networks":
Microsoft does not officially support a mixed network of Exchange 2003 and 2007. This will be a problem for several sites, as many of them will need to retain one or more Exchange 2003 servers for the foreseeable future. ... This isn't a problem during a transition period when you're migrating from 2003 to 2007, because Microsoft will support you during such a period.
I'm not sure how anyone can draw such a distinction.  So, as long as you are moving to our new stuff, we'll support you, but if you have the audacity to want to keep running the old version along with the new, you're unsupported.  This is going to be a fantastic situation for mergers, acquisitions, distributed IT organizations, and pretty much everyone who wants to run an IT shop based on their own decisions, not their vendor's.  Oh wait, Microsoft shops are used to that.

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