Calendar modify by an attendant problem

Question

Hi ,
I've got a problem with ceo calendar update via active sync.
Everything works fine if a new appointment is inserted on the ceo's calendar by his secretary.
 (she has editor pemission on the calendar). If Ceo's secretary changes an existing appointament modification aren't replicated on ceo Iphone.
I checked IIS log without notice someting strange.
Also check didn't show any issue.
What are the further troubleshooting that I can take to investigate the issue
Thanks a lot 
Luca Pozzoli

Answer 1

Hello, we have similar problem which we discuss in thread Calendar not syncing on iPhones
with iOS 8.x.x. We manage to open case to Microsoft, but we not find issues at Exchange side. So we discuss option to open case at Apple.
Reset sync (remove and add sync profile) on device solve problem only temporary.
Hello, we currently encounter some problems with Exchange Active Sync (EAS) with iOS devices.
We manage to find some cases, when meetings are not updated properly in EAS connected devices after complaints from user side. This devices are heavily used by higher management, so we
take this as our priority to solve as IT department.
Broken scenarios which we manage to identify are based on situations when mailbox “Manager” has set delegated access rights to his calendar “Assistant” with Outlook:
Manager create long recurring meeting in his calendar. Assistant open and change one occurrence date or time. This occurrence is not synced to device and stay in original date and time. – FAIL
 Assistant create long recurring meeting in Manager calendar. Manager open and change one occurrence date
or time. This occurrence is synced to device properly. – OK
Manager create long recurring meeting in his calendar. Assistant open and change one occurrence date or time. Manager open and change same one occurrence date or time. This occurrence is not synced to device and
stay in original date and time with first change from Assistant. – FAIL
Assistant create long recurring meeting in Manager calendar. Manager open and change one occurrence date or time. Assistant open and change same one occurrence date or time. This occurrence is synced to device properly
and stay in original date and time with first change from Manager – FAIL
We also find out that the last two scenarios show in Outlook calendar incorrectly from which this update came. Assistant see that change was made by him. Manager see that change was made
by him. But time is same in both.
In OWA are meetings displayed properly. Also if we reset account on device, it syncs properly last change. Side problems is, if this meeting is broken this way, is broken also reply’s for
another’s persons which are invited to meeting.
Our environment:
Exchange Server 2010 Service Pack 3 with Update Rollup 7
Office 2010 Professional Plus Service Pack 2 with all updates from Microsoft Update
iOS devices with current latest update 8.1.1
We tested turn off Outlook Cached Mode and make test with EAS sync logs, but we don’t find anything strange based on
http://support.microsoft.com/kb/2563324. It seems as error at 7.1.
We also find article
http://support.microsoft.com/kb/3015401 but it states different problems. We run Exchange Calendar Repair Assistant, and mailbox repair and move to another database, but without success.
We tested also Windows Phone and Google Android devices with this scenario, but there was no problem and meetings was updated correctly. It seems to be only problem with iOS devices.
Now we want to test, if we encounter this behavior also with Office 365 Exchange Online. If there will be no problem, we will try to push fast to migrate there.
In environment wad one only minor changes by regularly patching Outlook clients and Exchange server. We encounter this problem mostly after upgrading iOS to version 7 or higher with one
person only. After upgrading to iOS problem start go even bigger and all manager encounter him.
After finishing tests with Office 365 we have this matrix of situations and resolution on device end:
Exchange (On-Premise 2010)
Test 1:
Manager > Change Assistant = Problem with iOS
Assistant > Change Manager = OK
Test 2:
Manager > Change Assistant > Change Manager = Problem with iOS
Assistant > Change Manager > Change Assistant = Problem with iOS
Test 3:
Manager > Change Manager mobile > OK
Assistant > Change Manager mobile > Problem with iOS
Office 365 (Cloud 2013)
Test 1:
Manager > Change Assistant = OK
Assistant > Change Manager = OK, only attendants with Windows Phone see right time of changes meeting only with acceptance first invite.
Test 2:
Manager > Change Assistant > Change Manager = Problem with iOS, only attendants with Windows Phone see right time of changes meeting only with acceptance first invite. If they don’t
accept, changes are not synced properly.
Assistant > Change Manager > Change Assistant = Problem with iOS, only attendants with Windows Phone see right time of changes meeting only with acceptance first invite. If they don’t
accept, changes are not synced properly.
Test 3:
Manager > Change Manager mobile > OK, iOS warn, that we changing recurring appointment, also WP and Android.
Assistant > Change Manager mobile > OK, iOS warn, that we changing recurring appointment, also WP and Android. But Android change it incorrectly.