Why doesn't my calendar on iPhone 6 (iOS8) sync with Exchange?

Have you tried turning your Exchange calendar off and then back on? Do you have any issues with your Exchange mail? Have you contacted your Exchange Administrator to see if there are issues with the network?

If the meeting time is changed, is another invite sent out? To be honest, I've never had a meeting time changed without a new invite being sent, that is why I ask.

I'm sorry. I've not experienced this, so I cannot comment any further. Maybe someone that has more experience with Exchange calendar can comment. It must be a requirement at my work that new invites go out rather than just updating. I also find it unusual that after turning off the calendar and then turning it back on that it does not pick up the change. It just seems to be displaying the information as if it is cached.

I have the exact same problem when I upgraded my iphone 5 to iOS 8.1. All works (mail, contacts) except the exchange calendar doesn't synch or only does sporadically. so anything I put on the phone doesn't get to our Exchange server and vice-versa.

Your problem is not the same. The OP is just about meeting invites. You say that your calendar does not sync at all. I would ask what you have done to troubleshoot this before I start making recommendations. I don't want to waste your time recommending things you have already tried.

I experienced a lot of syncronizing problems after getting my new iPhone 6. At my work, we have an automatic exchange setup-file, which is assigned to the phone automatcly, and can be seen in settings->general->Profiles & Device Management. It seems like all settings for this profile isn't as I wish them to be.

To get invitations to work and syncronizations as well, I had to go to:

settings->Mail, contacts, calendars->Sync-> press "All Events"

After doing this everything seems to work.

Hope this helps.

I have the exact same problem with IOS 8.1.1, IPhone 5S and Exchange 2010 ( I have tested this on 3 phones so far and the issue is 100% reproducible)

If you modify an occurrence of a recurring meeting more than once, the phone will not show the latest update to the meeting.

I have traced the ActiveSync conversation on the Exchange server and I can see that the correct information is being sent to the phone.

+1 mchenard.....Same issue here exactly. Although I'll add that we're on Exchange SP1 CU8 (unsupported, but moving to SP3 in a few weeks). Mchenard, what SP level is your Exchange 2010 server at?

I have exactly the same problem. The emails are syncing fine. It's just Exchange Calendar that won't sync. I thought I was doing something wrong (yep, deleted account, re-installed etc. etc.) but now I see there's a whole community struggling with this issue. My iPhone 5S and iPad do sync (with latest iOS) which seems to make it an exclusive iPhone 6 problem.

We are on SP3 RU7, I don't think this issue has anything to do with Exchange. I tested the problem with an iPhone and a Windows phone, side by side ynced with the same account, the Windows phone was working fine and the iPhone stopped updating the meeting after the second modification.

If your phone looks like it's not syncing the Calendar at all, this is not the same issue. I have had this reported to me a few times and in the cases that I have seen the Calendar is syncing ok, it's just that the Calendar setting were not displaying the Exchange Calendar because it wasn't selected. When you're in the Calendar app, click on the word "Calendar" at the bottom center of the screen and make sure that you have a check mark on the left of the calendar entry for your exchange account. We have deployed iPhone to 600 users and for some unknown reason we had about 20% that did not have the check mark for the Exchange account when the phone was configured.

Thanks for the additional Exchange info.

I've verified your observation but with a Blackberry 10 device (which now uses ActiveSync) and an Android device on ActiveSync....both devices sync multiple changes to a recurring instance.

I've opened a call with Microsoft Premier Support. They have our ActiveSync logs, and device sync logs. I'll update when I know more.