Can’t join an online meeting through a proxy server that only supports basic authentication in Lync 2010

Symptoms

This issue occurs in the following scenario:

You sign in to Microsoft Lync 2010 in an organization that has a proxy server deployed, and the proxy server only supports basic authentication.
A Lync 2010 user in a non-federated organization sends you an invitation for an online meeting.
You try to join the meeting.

Note To join the meeting, you must access the Internet through the proxy server.

To resolve this issue, install the following cumulative update:

2884632 Description of the cumulative update package for Lync 2010: October 2013

This issue occurs because Lync 2010 does not prompt the user to input credentials for the proxy server.

To work around this issue, you must use a proxy server that supports NTLM authentication.

Keywords: kbqfe, kbfix, kbsurveynew, kbexpertisebeginner, kb

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