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Users have to manually input the user name every time that they sign in to the Lync 2010 client
Article ID: 2681509 - View products that this article applies to.
Users must manually input the user name every time that the user signs in to the Microsoft Lync 2010 client. This issue occurs when the following conditions are true:
This issue occurs because the function that is used to retrieve the sign-in information about the user does not obtain a correct value after KB 2670498 is installed.
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2670326/ )Description of the cumulative update for Lync 2010: February 2012