We had an incident where a user was inviting attendees to her meeting using Outlook Scheduling Assistant. She would create a meeting then add all the attendees and send out the invite. Well an attendee would delete that event from their Outlook Calendar and it would in turn send out to all other attendees that the meeting was cancelled.
This is because the 2 exchange environments were not synced and when they had the Meeting on their Outlook it thought that they were the organizer. So deleting it would send out a cancellation notice to all attending.
Sorry, I was wrong about this. but there is still an issue and it appears it is with iOS 6. Here is microsofts writeup on it. http://support.microsoft.com/kb/2768774
“Microsoft is aware of an increase in issues for meeting requests that coincided with the release of Apple iOS 6 devices. When this occurs, users that are attendees of a meeting may inadvertently become the meeting organizer.
The organizer information in Microsoft Outlook and Outlook Web App (OWA) is not changed in this scenario. If an attendee takes action on a meeting item using an Apple iOS 6 device, synchronizing with Microsoft Exchange Server using Exchange ActiveSync (EAS), the meeting organizer may be changed and replaced by the attendee.
As a secondary result, the device may incorrectly assume that the device user (attendee) is the organizer, and can send meeting updates or cancellations to all of the original meeting attendees, as if the mailbox user is the organizer.”
The fix is to make a meeting, and then send that meeting as an attachment (ICS file) to all the attendees. This way you are not trying to integrate the attendees with the Meeting Event.