Calendar sync between IPhone & Outlook


I have at least two iPhones ( 4 & 6+ ) as well as few droids ( LG & Galaxy S5) were the calendar events don't seem to sync
correctly/completely. That is, I have a recurring event on one iPhone that was deleted from OUTLOOK a while ago but
remains on the iPhone.  As well as the inability to put events on the IPhone and have them sync back to OUTLOOK.

On the Droids, syncing is hit or miss in either direction.

The only device were it works as expected is on Blackberries ( 9900 or Q10)

What I have tried on the IPhone:
Rebooting the device(s).
removing the Exchange Account and re-adding it.
installing the OUTLOOK app from the Apple store ( still get the same issue ).
searched the web and found it seems to be a common problem without much help from APPLE.

So I was just wondering if anyone had the same issue and
HAD a resolution for the problem?

Thank you Very Much..
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Thomas GrassiSystems AdministratorCommented:
couple of questions here
1. which version of exchange server?    
2.  what type POP3 IMAP Exchange?
3. Is activesync working or these accounts?
4. What version of Outlook?
5. what is the IOS of the iphones?

do you have any other iphones working? Do you have any other droids working?

IOS 8 had some issues syncing have not seen from apple if the resolved that yet.
GST-GRIDTECHAuthor Commented:
1. which version of exchange server?     Migrating from Exch 2k7 to 2k13
 2.  what type POP3 IMAP Exchange? exchange
 3. Is activesync working or these accounts? yes
 4. What version of Outlook? 2010
 5. what is the IOS of the iPhone's?  8.1.3

 do you have any other iphones working? these are the ONLY 2 I have access to right now & will need to check the others

Do you have any other droids working? 1 other S4 does seem to be working, but he doesn't use the cal much to be able to tell.

 IOS 8 had some issues syncing have not seen from apple if the resolved that yet.   I think it may not be fixed, I've seen post of those that have upgraded to the latest  IOS and still have the problem..
Thomas GrassiSystems AdministratorCommented:
when did this start happening?  

Are these accounts on exchange 2k7 or 2k13?
GST-GRIDTECHAuthor Commented:
still looking into issues with droids.

However, for the IPhone,
The solution is to make sure correct default calendar is set and ALL
additions are to the default Cal..

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GST-GRIDTECHAuthor Commented:
trial and error testing with multiple iPhones & user calendars...
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