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"ChangeKey is required for this operation" error message in Outlook for Mac 2011 in an Exchange Server 2010 environmentArticle ID: 2556352 - View products that this article applies to. SYMPTOMSAssume that a Microsoft Outlook for Mac 2011 user moves an item, and then changes the category of the item in a Microsoft Exchange Server 2010 environment. When Exchange Server synchronizes items with the Outlook for Mac 2011 client, the user occasionally receives the following error message: Error Could not synchronize record: <Message Name> to Exchange server: <Exchange Server Name> Details ChangeKey is required for this operation. Error code -19946 CAUSEThis issue occurs because the MoveItem operation in the Microsoft Exchange Web service returns an incorrect ChangeKey property of a moved item when Exchange Server synchronizes items with Outlook for Mac 2011 clients. RESOLUTIONTo resolve this issue, install the following update rollup: 2582113
(http://support.microsoft.com/kb/2582113/
)
Description of Update Rollup 5 for Exchange Server 2010 Service Pack 1STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. MORE INFORMATIONFor more information about the MoveItem operation, visit the following Microsoft website: General information about the MoveItem operation For more information about the ChangeKey property, visit the following Microsoft website:
(http://msdn.microsoft.com/en-us/library/aa565781.aspx)
General information about the ChangeKey property
(http://msdn.microsoft.com/en-us/library/exchangewebservices.itemidtype.changekey.aspx)
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