We're seeing complaints that Outlook automatically sends meeting updates to the attendees several times a day. When users delete the responses from their inbox it triggers another update to attendees.
The good news: it’s not user error.
The bad news: it appears to be a problem only for people who sync iPhones with Exchange.
The bug appears when the user creates an appointment in Outlook and includes themselves as an attendee, often because they are the members of a distribution group or a delegate.
The repro steps are as follows:
- The iPhone user creates a new appointment in Outlook and uses a distribution group as an attendee; the meeting organizer (iPhone user) is also part of the distribution group.
- The Meeting organizer sends the appointment from Outlook.
- An attendee accepts the appointment request.
- The organizer receives the response from the attendee and deletes it from their inbox.
- A meeting request update is sent out to all attendee’s of the meeting.
- This repeats itself and continues to send out meeting updates.
Until Microsoft or Apple releases a fix, use this solution discovered by Derik and Mark:
When creating a new appointment in Outlook, do not include yourself as an attendee. If you are using a distribution group to invite others, expand that group and remove yourself as an attendee.
Phillip suggests setting an end date:
We are having users report a similar issue, it appears that the main issue is with repeating calendar invites that DO NOT stipulate an End-Date. The users iPhones are sending out the meeting notifications. Having the organizer cancel, then delete the original repeating meeting and then recreating the repeating meeting with a valid end-date specified, resolves the issue once the iPhone resyncs with the calendar.
Exchange 2010 SP3 RU13 iPhone iOS - (random, several versions)
Outlook's no end date option can be disabled via a registry edit or group policy. For more information, see
Apple Support Forum Topic : 3.0 Causing Multiple Copies of Invites to be sent through Exchange
Current issues with Microsoft Exchange ActiveSync and third-party devices (Microsoft Support)
If you can’t sync your Outlook contacts and calendars to your iPhone, iPad or iPod touch using iTunes for Windows (Apple)