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Sharepoint Calendar entries are duplicating

Posted on 2010-11-11
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Last Modified: 2012-06-27
The previous resolution does not apply to what we are seeing.

 We have loaded Sharepoint server on a network with Exchange 2003. After copying the public calendar over, it continues to duplicate going from 3000 to 30000+. This is a single action and nothing else is taking place. We deleted , re added 2-3 times with the same results. The copy is taking place on a end users pc using MS Office 2007.

My thought is there are sync settings allowing duplicate entries, I have yet to find any information on this.

Any assistance is very much appreciated!

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Question by:vancampconsult
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JonahGrimm earned 500 total points
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Hokay - I ran across this one myself, on our first SharePoint installation.

Essentially, what we found was that - for calendars that had large numbers of items - Outlook essentially never stopped syncing during the initial sync.  You'd start a manual Send-receive, and before that completed, the automatic Send-receive would kick in - thus slowing everything down - and since Outlook never gets a 'completion' result on the process, the next automatic would start and...

well.  And so on.

In order to fix this for these initial calendar moves, we did the following (which may be slight overkill):

1) Make sure the sharepoint calendar you're trying to use is disconnected from Outlook.
2) Disable automatic send-receive on the outlook client you're using.
3) Connect to the sharepoint calendar.
4) Cut and paste your items from the old calendar to the new one.
5) Sync ONLY that calendar, using 'send recieve this folder' from your send/receive choices.
6) IMMEDIATELY disconnect the sharepoint calendar.

You can reconnect it and enable automatic send/receive once your data's in-place - and all works well.  It's only on those first, huge loads that it's a problem.  Note too that we have not run into this issue with Outlook 2010 - only 2007 caused us this sort of trouble.

I hope that's a help.

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by:vancampconsult
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I will attempt to copy through Outlook 2010
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by:vancampconsult
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We are not sure why it is still replicating, we even go as far disconnecting the sharepoint list. Going forward we will test with Exchange 2010 and 2007 client.
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