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Duplicate Outlook calendar entries created after user added to BES

tick1231 asked
Last Modified: 2012-05-09
The problem is that when users receive meetings/appointment updates, a new calendar entry is created (instead of updating the original one on the user's mailbox).  If a user is working from .PST, the calendar entry in the personal folder is updated properly while multiple calendar items are created on the server.  I have isolated it in that it only begins when a user is activated on one of our BES, but this is happening to several hundred people.

I created generic user accounts/mailboxes, and sent meetings and updates back and forth (worked fine).  I added one user to a BES, and once the account was activated on a phone the issues immediately began.  The duplicate entries are only in the user's Exchange-side calendar (and created when it hits the user's Inbox), the wireless device updates appropriately.

We have a mid-sized enterprise environment with our users (WinXP mainly, a mix of Outlook 2003 and 2007 at varying service pack levels) connecting to one of about a dozen Exchange 2003 SP2 servers running on Windows 2003 Ent. SP 1.  We also have a few servers running Blackberry Enterprise Server (one at, one at also on 2003 ENT SP1.  Every cdo.dll file is the same version (6.5.7654.12) among every one of the servers.

I have already recommended we patch/update all BES to the latest version, as well as a reboot of the Exchange servers, but this is a large corporate environment so it's not a quick process.  Definitely at a loss here, any help or advice is greatly appreciated!
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