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Event ID: 1008 Source: MSExchangeActiveSync

Level
Description
An exception occurred and was handled by Exchange ActiveSync. This may have been caused by an outdated or corrupted Exchange ActiveSync device partnership. This can occur if a user tries to modify the same item from multiple computers. If this is the case, Exchange ActiveSync will re-create the partnership with the device. Items will be updated at the next synchronization.

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Comments
 
As per the first comment on this issue I was able to correct this issue by changing the inheritable permissions. But to access the security tab on the active directory user you first have to select "view > advanced features" under active directory. See EV100414 (Exchange ActiveSync Returned an HTTP 500 Error).
In my case, I had to go to the User in Active directory, and under Security, Advanced I had to make sure Inherit from Parent Object was checked. Once I did that, the email started flowing without issue.
This warning occured after a user came to me saying his iPhone was retreiving mail very slow. My warning was giving me the explanation below:

--- Exception start ---
Exception type: System.Web.HttpException
Exception message: Maximum request length exceeded.
Exception level: 0
Exception stack trace:    at System.Web.HttpRequest.GetEntireRawContent()
   at System.Web.HttpRequest.get_InputStream()
   at Microsoft.Exchange.AirSync.AirSyncRequest.get_InputStream()
   at Microsoft.Exchange.AirSync.Command.WorkerThread()
--- Exception end ---.

Ended up happening because he was trying to send an e-mail from his iPhone with an attachment that was too large (9MB). The message was hanging in his Outbox on his iPhone, but not in Outlook. Deleted the message in his Outbox on his iPhone and all was fine.
See ME933314 and MSEX2K3DB for information about this event.

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