Article ID: 2735320 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the privacy relationship configuration incorrectly affects the display of mobile phone numbers that are stored in AD DS. Therefore, the Mobileitem and the mobile phone number are not displayed.
Note The privacy relationship configuration should affect the display of only those mobile phone numbers that are set in the Lync client.
To resolve the issue, install the following cumulative update:
(http://support.microsoft.com/kb/2737907/ )Description of the cumulative update package for Lync 2010 for Windows Phone: October 2012