Hello, Since a couple of weeks ago, any changes which we make to the starting or ending times of Calendar appointments do not show up in either OWA or on PDAs using Activesync, i.e., they keep the original start or end time forever. Changes to any other fields, e.g., the subject or text, do show up. Seems to affect all users. The only thing we did was install some critical OS patches on our Exchange servers. Anyone got any ideas please? Exchange 2003 with Outlook 2003 clients. Thanks, - Alan.

Found the reason - an Outlook COM add-in that we developed. When I uninstall it, the problem goes away. I read that it's not releasing the appointment item in memory. What's strange is that we haven't updated the add-in since at least six months ago but the problem has only surfaced now.