Yosemite Calendar - Outlook/Exchange calendar events keep updating and sending out invitations to participants

Interesting - it definitely stopped happening for at least a few days after upgrading to 10.10.3. But I can also confirm, that it's reverted to the previous behavior of sending out updates on every interaction with a notification. The same thing happened to me after upgrading to 10.10.2. Weird.

There is another strange behavior I've seen which might be related as well.

If I open an existing recurring event (which I created and invited others and they accepted), and then close it, I am asked if I want to update only this even, or all future events, even though the event has not been updated. Choosing "revert" does nothing. So I have to choose either to update this even or all future events. And then when I do, everyone who was an invitee gets three or four new invitations for this event *which has not changed or been edited!*

So annoying!

Same here. 10.10.3 did not fix. Seemed to work initially and we are not back to the same bad behavior. Bloody annoying

The only solution is to disable the Alerts for the Calendar which pretty much *****.

I am confused by the comments as I see people successfully resolving the issue and others not being able to.

I am using Outlook for Mac 2011 v. 14.4.8

Is there anyway to make any update to Microsoft or Yosemite that will resolve this issue - or should I just stop using the product?

The current issue has risen to a level I am ready to just chuck Outlook.

I had not faced this issue until just recently without any change on settings or installed applications. One week the calendar app was playing nicely with Exchange calendar events, the next week it wasn't. Although I don't know for sure, given that it was once working and is now not, possibly between the two states of working and not working I received a malformed invitation or an invitation which the calendar app could not handle correctly which messed with the way the calendar app handles Exchange events.

I do not have Outlook installed on my mac, and use the built-in Mac Calendar and Mail apps with my Exchange account.

Calendar invites were being sent to colleagues and clients repeatedly, even old ones which had had no changes made to them. I talked with a couple of frineds and colleagues and they have seen this behaviour too. This issue basically makes exchange calendar events unusable on a mac.

Since this was becoming extremely annoying for clients to deal with and created an unprofessional appearance, since there is no choice but to use Exchange calendar invites for work reasons, the only working solution I have found is to completely remove calendar use on my exchange account and use alternative devices for calendar management.

I am not sure how helpful this would be - but I have found a work around by eliminating the calendar in Outlook on my machine and switching to straight webmail - that bas eliminated the issue until Microsoft / Apple decide to fix it.

Surprised they have not yet

Has anyone tried the new 10.10.4 release?

The problem did occur in 10.10.2 sporadically, but not in 10.10.3 any more for me. So I guessed it has been solved. Now I am on 10.10.4 and have the problem again – and now it is even worse: now every meeting I have set up with invitees triggers this issue. In absolutely any case: as soon as I click the reminder to snooze or cancel it, event updates are sent to all invitees. Very annoying bug.

I am using Exchange, of course.

That's unfortunate. I saw the problem on 10.10.3. It was very repeatable.

iI'll probably upgrade to 10.10.4 tomorrow, but this doesn't bode well.

I'm running 10.10.4 and I continue to have this problem. I finally relented and switched to Outlook. It's embarrassing to constantly bombard people with meeting updates.

I am told this bug is fixed in 10.11 but will not be fixed in Yosemite. I did try quitting Calendar when the popup occurs and it seem to prevent it form sending out the update. Not ideal but worth noting.

Unbelievably frustrating bug. It still exists in 10.10.4.

Interesting that you all are blaming Yosemite. I am still running Mavericks and I just recently started seeing this happen for me in Outlook. It started about the same time Office updated to 14.5.3. I've got some older issues fixed with the last update, which I'm happy to see go away, but then this started to occur so I went Google searching and found this thread.

I would suggest this is a Microsoft Office issue not an Apple OS issue except that it's also seen in iCal. Very disappointed that there isn't a clear-cut diagnosis.

jxwinks-

This thread is about a problem with the native Apple Calendar and Apple Mail in Yosemite. The bug has been confirmed by Apple and several of us are using Outlook to work around the issue.

You may be seeing something similar in Outlook, but it's a different issue.