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.

The fix was to remove a rogue PR_HIDDEN property from the affected user's mailbox.

It's thought you can prevent this from happening by ensuring you upgrade the BES server first, including the Collaboration Data Objects (CDO) component.

... Richi Jennings, with thanks to Sekou Page

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