An update is available that adds an example of a user name format in the "Details" section in Microsoft Lync 2010 for Windows Phone. The example of a user name format is "domain\user" in English or "domain\xyz" in some languages. This example can help users enter user information in the correct format during the sign in process.
For more information about the update, click the following article number to view the article in the Microsoft Knowledge Base:
2737907 Description of the cumulative update package for Lync 2010 for Windows Phone: October 2012