Meeting in Attendee’s Calendar Loses Track of the Meeting Organizer:
“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.”