Article ID: 2464821 - View products that this article applies to.
Consider the following scenario:
In this scenario, an Exchange error notification displays in the status bar of Lync 2010.
This issue occurs because Lync 2010 cannot connect to the Autodiscover service when it connects to the Exchange server through an authentication proxy.
Note For more information about Autodiscover service, visit the following Microsoft website:
Understanding the Autodiscover service
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2496325/ )Description of the cumulative update package for Lync 2010: April 2011
Note You must upgrade your Internet Explorer to Internet Explorer 8, or a later version after you install this update.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.