IPhone to Exchange calendar sync issues

OK, I have read through many posts on here, but have yet to find a post that describes my situation. If someone has seen this answered in other places, please let me know.
I currently have the following setup:
iPhone 2.2.1, using OTA sync with Exchange
Entourage 2008 (not Outlook/Windows)
Exchange server 2007 (at work, I am not the guy who runs it)
My mail and contacts work fine.
CALENDAR issue for me is something I can't quite wrap my head around:
I get syncs fine for calendar when accepted through Entourage - but when they are updated by the original senders I get multiple entries for every event showing up on my phone (the old events aren't removed). In addition, my phone does not sync back to the Exchange server when I accept invitations, nor when I create entries in my calendar.
Thoughts?

This problem is only something I've had problems with recently. Previously entries in the Calendar would sync OK regardless of where they were created or accepted. So appointments I logged on the road into the phone would work back into Exchange and onto Entourage.
Two things have changed. Our Exchange server was upgraded and how has Active Sync which means I now get push notifications which is great. I've also gone up to the 3.01 software on the iPhone.
Now, it seems I am ONLY getting push from Exchange to the iPhone. Calendar entries from Entourage appear on the phone.
Any calendar entries created on the phone or invites accepted on the phone stay on the phone. They are not synced back to Exchange and onto my Entourage calendar.
As someone who is office based for only a few days a month, effective Calendar sync is vital.
If the problem is with the OS update on the phone then this fix needs to be part of 3.02. If the problem lies with the Active Sync setup then I need some instructions to go back to our Sys Admins with.
Thanks!

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Most of the problems that people are seeing, including myself, are more to do with Mail and Calendar simply not synchronizing.
My Mail.app INBOX for my Exchange server is now several hours behind my iOS and Windows Outlook instances. Calendar appointments are simply not being pushed to the server (though they seem to be retrieved OK).
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I have iPhone 4 with iOS 5.0.1 installed. My company uses Miycrosoft Exchange Server and I have synched my iPhone using the Microsoft Exchange server account option. I don't have any probelm with my emails or contacts.
However, the calendar is not synching properly. After I setup the account for the first time, I see many of my calendar items has been synced. But some of them are missing. I can't find any reason why those items are missing. I added/deleted new items on my calendar on Outlook Web Access and it showed up on my iPhone. I also tried adding/deleting items on my iPhone and they synched appropriately. The only issue is some of the pre-existing items are not showin on my iPhone and I can't find any reason for it.
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• Scroll down and locate the Calendar section
• Tap Sync (under the Calendars section)
• Set the interval to All Events
• Close the Settings app (Tap Home button)
I suggest rebooting the iOS device. Check the calendar and let it sync – look for those missing events.
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Exchange Calendar Sync Issues List

I have noticed three things that are driving me insane and wonder if anyone else is having the same problems and/or has found a fix for the problems below.
1. If you add an appointment in Outlook with categories, by editing it with the iPhone in any way, it clears the categories every time consistently. This is a huge issue for us!
2. You cannot add a private appointment from the iPhone
3. You cannot change the view in the calendar on the iPhone. The default view is to see all the appointments in 30 minute increments, I need this to be in 15 minute increments.
Anyone else what to add to the list? I figured we can list it all here so that Apple has a reference to see some of the issues we are having.
Thanks,
Zach
Message was edited by: PheNeM
Message was edited by: PheNeM

Hmm, i jut bought an iPhone 3g and imust say it has not impressed me with regards to its Exchange capabilities. some of my dissatisfaction are as follows:
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- i can't load any of my mp3 songs as my ringtone or my calendar or my sms alerts as Apple specifies the ringtone has to be <30 seconds and no customisation for sms/reminders...sigh...;
- also, if i open up any office documents >1mb, my iphone crashes or simply doesnt open them;
- i share some of my calendar with my staff. In my previous Sony Ericsson P990i, when i enter an appointment, i could mark personal appointment/reminders as "private". iphone doesnt allow me to do so hence, the whole world knows my appointment...sigh..;
- iphone doesnt allow u to sync with microsoft outlook notes...sigh...
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I KNOW THIS IS lONG, BUT PLEASE TAKE THE TIME TO READ IT.
OK - After about 5 hours of troubleshooting I have FIGURED out why my battery was lasting only 3.5 hours. I hope this helps.
1. completely wiped the phone away and brought it back with push disabled. EVERYTHING FINE
2. I enabled push waited 1 hour. EVERYTHING FINE
3. I enabled mail push syncing. EVERYTHING FINE
4. I enabled contacts push syncing. EVERYTHING FINE
5. I enabled calendar and BAM battery starting spinning in overdrive. The calendar was the issue.
6. I disabled push and to my surprise it did not get better, only after a reboot did the batter return to normal. OK - so I have narrowed it down to the calendar.
7. I am using Outlook 2007 with Exchange 2003.
8. I took a bold step and archived my entire calendar to a pst file so it left nothing in the calendar.
9. Again to my surprise the battery started draining immediately when i enabled the calendar again. On a hunch I checked the properties of the calendar and it said there was a few kb left. I could not do anything to find these.
10. I logged into Outlook web access (http://exchangeservername/exchange - if enabled) and did a search on the calendar and it found two orphan calendar entires. I deleted them.
11. I enabled calendar syncing again and it went perfect. I then copied back all of my calendar entires from the archive pst to the calendar and luckily no problem.
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Hi, Please do not post duplicate threads.
see here > http://supportforums.blackberry.com/rim/board/message?board.id=8300&message.id=37254#M37254
You are posting your message in device threads meaning normal everyday users are going to read it, if you want advice from administrators, please post it in Blackberry Enterprise Server area.
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Thankyou
If your issue is resolved, put a checkmark in the green box that contains the resolution.
OR
If it was just/or also really helpful - Give it a Kudos.. Go on Mate.. Help the rest of the clueless blackberry user world find their answer too..
~Gday from Down Under~

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Outlook 2011 is not compatible with iCloud, it won't work and your 'workaround' may affect iCloud clients on the same account.
Don't use 2011.

Looking for exchange calendar sync groupcal *****

Looking for exchange calendar sync system to replace sucky groupcal.
I've had nothing but problems with it. I get duplicate calendars, duplicate calendar entries, and the daemon stops updating from the
then the support folks are threatening to cut off support and no longer help me to fix their broken code!
I wasted money and so much time on this app, is there anything else out there that does a better job?

Not to mention that it doesn't work with Leopard now! I wish there was a way to get my Exchange calendar to sync to a third party that would sync with iCal 3.0. Since there is not support for CalDAV it would be nice if Exchange would support this!

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I had noticed several issues with my calendar and it's (in)ability to sync correctly with my company Exchange Server (2007 SP2) (with OWA support and ActiveSync on, running and verified using https://www.testexchangeconnectivity.com)
OBSERVATIONS/FAULTS
1) Over a period of time, I noticed appointments accepted from others or created myself on Webmail/Entourage 2008/Outlook 2010 in VMWare on the same Exchange server were not appearing on the iPhone
2) Invites accepted on iPhone did appear in webmail + clients
3) After iOS 4.2.1 update from iOS 4.1 (iPhone 4 is only 1 month old), issues got worse
4) Did a complete restore to iOS 4.1 and clean install. Exchange would connect 100% of the time, Mail and Contacts sync without fault. Calendar would not sync at all. At the time of account reconnection, there were 4 invites unanswered in my Mail Inbox which immediately got picked up by the iPhone, but all existing invites/appointments did not appear
5) Repeated Step 4, but going back to iOS 4.2.1 (I'm a sucker for the latest software for my sins, but don't believe this is wholly related).
FIX
How I "fixed" this (and by fixed I mean I can get all my appointments now)
1) Under Settings > Mail, etc.
2) Under Calendars (bottom of settings window), switched off Time Zone Support (note, Exchange server is in the same time zone as I am in). Also set Sync option to sync all, not just 2 weeks (and yes I did have invites newer than 2 weeks in my Exchange calendar)
3) Voila! It picked the invites up.
4) I've since set the calendar to sync only 1 month back as I don't need all the old invites on my iPhone
QUESTIONS
Do the Apple Support Team have any ideas why this would happen and why this fix seemed to work for me?
If anyone else is suffering this, maybe try the above and see if it helps, I'd be interested to know as this might help IT departments everywhere

I was so glad to get multiple Exchange account support with iOS 4. I have been synching with my work account (calendar, mail) and with my Google accounts (calendar, mail, contacts). After upgrading to iOS 4.1 three days ago, my Google accounts appear to be working fine but my work account refuses to connect to the Exchange server for calendar or mail.
My company forced a passcode when I originally added the account. For troubleshooting I removed the account and recreated it. The account verifies but never requires that I have a passcode. I then removed all of my Exchange accounts, restarted my phone and recreated my company Exchange account. Again, verifies without requiring a passcode, and neither my calendar nor my mail will connect - zero events, zero emails. My mail even proudly says it updated and shows the current time/date stamp - but nothing. When I upgraded to 4.02, I had to set up a passcode. I am highly suspicious that because 4.1 is not synching properly because it is not handshaking correctly regarding the security on the Exchange Server ... that is my guess. And I echo, IT NEEDS FIXED! I am screwed not being able to get my emails and calendar events on-the-fly.

IPhone to Exchange calendar sync issues

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