We are running Exchange 2003 and Outlook 2007. We have noticed some problems as of late with regards to calendar's and many users are reporting the same kind of problems. If a meeting invite is sent to the outside with multiple outside address, and the calendar invite is updated the list of recipements is duplicated. For instance I send a invite to joe@joe.com and frank@frank.com and then update the meeting the invitte list will suddenly say joe@joe.com,frank@frank.com,joe@joe.com, and frank@frank.com. Another issue is when the invitie's update the calendar the times turn into tenative and not confirmed. I am not sure these issue are related. Thanks,

Hi, Are the user facing the same issue when using owa & are these user suing any mobile device to access there mails?Ripu Daman Mina | MCSE 2003 & MCSA Messaging | MCC

The duplicates show up in OWA, as far as doing a invite in OWA I am not sure. We do use a BES server for mobile access.

Hi, Based on my research, I suggest you install the update from the link below to check the result. http://support.microsoft.com/kb/968009 However, if the issue persists, it may be caused by default. http://support.microsoft.com/kb/931767 Thanks. Novak Wu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.