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Duplicate contacts are created when you synchronize a mobile device by using Exchange ActiveSync
Article ID: 2711181 - View products that this article applies to.
Duplicate contacts may be created when you synchronize your mobile device by using Microsoft Exchange ActiveSync. The duplicate contacts are synchronized to the user's mailbox on Microsoft Exchange Server.
Additionally, contacts may be duplicated multiple times. Therefore, many contacts may be displayed in Microsoft Outlook and in Microsoft Outlook Web App.
This issue occurs because the Contact application on the mobile device crashes.
STATUSThis issue is currently under investigation by the mobile device manufacturer.
To work around this issue in Microsoft Outlook 2010, follow these steps:
For more information about how to remove duplicate records, visit the following Microsoft website:
http://office.microsoft.com/client/helppreview14.aspx?AssetId=HP010342518&lcid=1033&NS=EXCEL&Version=14&tl=2&respos=0&CTT=1&queryid=8a5caa71%2D54a5%2D4ff6%2Da18c%2Da928cf21f9b9The issue that is described in the "Symptoms" section is related to the high CPU usage issue that can occur when you try to synchronize many contacts. For more information about this issue, see the following article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/2711053/ )High CPU usage when you synchronize a mobile device to an Exchange Server CAS
Article ID: 2711181 - Last Review: May 17, 2012 - Revision: 2.0