Article ID: 2913469 - View products that this article applies to.
Assume that you have an Office 365 account, and then you change the password of the account to have more than 16 characters. In this situation, you cannot sign in to Microsoft Lync for Mac 2011 by using the account.
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2909662/ )Description of the Microsoft Lync for Mac 2011 14.0.7 update