Exchange iOS calendar sync 4 cancellations & accepted meetings

Using corporate Exchange 2010 servers for calendar and email me and my co-workers experience the following annoyance.
When a meeting in outlook is cancelled and this is accepted using the windows client, the cancelled meeting is still shown in de ios calendar. It is noted cancelled using strikethrough, but it still clutters my calendar. As my calendar is a battlefield these cancellations make it hard to see which meetings I do have... How can I change this behaviour?
Similarly for accepted meetings, these (with cancellations aswell) remain unprocessed in my ios calendar tray while I allready accepted or rejected the invitations using outlook in windows.
I'm referring to ios because I have this problem with both my iPhone (4S on ios5, no iCloud sync for calendar) and iPad (2 on ios5, no iCloud sync for calendar).
Result: cancelled meetings have to be removed manually on iphone en ipad, invitations in outlook have to be processed three times (pc, iphone, ipad).
My questions: is this behaviour recognized? (i.e. is our Exchange setup different or is this a general problem).
Any tips/hints how to solve these bugs? or should I try to accept them as features...
Thx!
Mike

Having same issue with following equipment: PC (standard corp issue laptop), BB (Blackberry phone), Tablet (Blackberry Playbook tablet)
Here are the steps:
Send out 3 meeting invites
The emails shows up on all 3 devices, PC, BB, Tablet
Before you open the email and accept/tentative/decline that invite...all 3 devices show the 3 "unaccepted" meetings on the calendar
Then accept meeting invite #1 on the PC, accept meeting #2 on the BB, and accept meeting #3 on the Tablet
After the acceptance all 3 meetings they show up fine in the calendars on the PC and BB...no problem here.
But only meeting number 3 which was accepted on the Tablet shows on the Tablet
The problem is that the other 2 meetings which were on the Tablet before being accepted, are removed when accepted.

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Hi,
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iPhone 2.2.1, using OTA sync with Exchange
Entourage 2008 (not Outlook/Windows)
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Power assertion timeout: https://dl.dropboxusercontent.com/u/26840/iOS_power_assertion_timeout_DataAccess _Exchange_related.png
and with https://dl.dropboxusercontent.com/u/26840/iOS_power_assertion_timeout_fetchMobil eSynchronously.png
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https://dl.dropboxusercontent.com/u/26840/iOS_preferences_timeout_turning_off_ca lendar_sync.png
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Not sure if this will help, I found it solved a slightly different problem. the following is a re-post from a different thread.
I've had similar issues - although my email and contacts were syncing with Exchange without issue, in iOS7 I developed a one-way problem with calendar sync.
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1.      Log onto Outlook Web Access
2.      Top right hand part of the screen select "Options"
3.     Select "See All Options"
4.      Select "Phone" menu
Check if you have 10 Devices registered.
If you have, you need to delete one of them to add your new Smart Phone to Exchange for synching
Check the "Last Sync Time" to indicate if this device is still active or not.

Exchange iOS calendar sync 4 cancellations & accepted meetings

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