Iphone not syncing calendar with Office 365 (business)

Posted on 2016-10-03
Medium Priority
Last Modified: 2016-11-09
I have an IPhone user that cannot get all calendar events to sync.  It would appear that calendar items that he has been invited to, show up on his phone.
Calendar events that he has in Outlook and OWA, do not show up on his phone.  I can create an event on his IPhone and it syncs with OWA and Outlook.  If I remove his Office 365 account from his IPhone, and add it back, the event I just created will not show up on the phone (along with all the others that are missing).
Question by:jfesler
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LVL 16

Expert Comment

by:Carol Chisholm
ID: 41826567
You don't mention the versions on the device and server. but there can be issues for old versions


Jul 26, 2015 8:20 PM in response to AnySuggestionsWelcome
I was told at an Apple Store today that with IOS 8.3, calendars no longer sycned from Outlook.  I had set up appt. for another problem and I was so surprised, I said to the Apple employee," So Apple decided  to make their devicesno longer sync to one of the largest market share calendars?"  Employee just said, "It's a Microsoft-Apple thing."  He then said there was a way to make it work, but it was so much trouble that no one would want to do it.  
I said something like_  I know this wasn't your decision, but doesn't Apple realize that millions of people use Outlook, and that Outlook is often used in the course of these millions of people's employment? 
He said something like - consider switching to gmail & use the associated calendar.
iPhone 6, iOS 8.3, Outook 2013

Author Comment

ID: 41826611
Thank you, I had found that article also.  The IOS version is, says it's up to date.  I am using Office 365, hosted by AppRiver.

Author Comment

ID: 41826620
FYI: I added this email account to my android phone and get the same calendar appointments as his IPhone.
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LVL 16

Expert Comment

by:Carol Chisholm
ID: 41826638
So it looks more like a mailbox issue than a device issue. Are events created in OWA synced to Outlook?

Author Comment

ID: 41826643
Yes, Outlook and OWA look good and are syncing.
LVL 16

Expert Comment

by:Carol Chisholm
ID: 41826650
Try point 1.12? Or 1.9?
Issue 1.12 - Appointment in Outlook or OWA is missing on iOS device
When a user syncs a mailbox by using an iOS device, the calendar on the device may be missing one or more appointments. These appointments are available when you view the calendar from Outlook or OWA. There may also be duplicate instances of the appointment in the calendar if the appointment is accepted from the device.

For more information, go to the following article in the Microsoft Knowledge Base:

3012590 Instance of calendar appointment is missing or duplicated on ActiveSync client


Expert Comment

by:JD Chavana
ID: 41826973
Was this account recently added to the phone or has this issue just start happening?

I've had some outlook issues with syncing with the latest iOS.
One simple thing that I've done to fix this issue is to go into Settings > Mail>Accounts> Select the email account>Turn off in your case Calendars. Turn off the phone. turn the phone back on and go back and turn it on and it worked.
Now with that being said it hasn't worked all the time, but the ones that it didn't work for were from clients running exchange 2010 or older. And in that case for the mean time I have them running the  Outlook app on their phones.

Accepted Solution

jfesler earned 0 total points
ID: 41827109
Thank you for the suggestions.  I reset the Network Settings on the IPhone, suggested by AppRiver.  That appears to have resolved the issue.  

It makes absolutely no sense to me, since I installed the account on my Android phone, with the same issues.  I can only guess the IPhone was messing it up.

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