Outlook Error- You cannot respond to a meeting without an organizer

[peterherrin]

I have a user that sent out an update to a re-occurring meeting on behalf of another user (the original was sent on behalf of as well) and when the meeting attendees go to accept the meeting they receive the following message "You cannot respond to a meeting without an organizer. You must add an Organizer field to the item."

I have a feeling it has to do with the Blackberry devises that some of the meeting attendees have but can't prove it. The users all run outlook 2003 connecting to Exchange 2000.

Thanks in advance for your help.

Peter