Article ID: 2688945 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the Online Meeting Add-in for Lync 2010 does not receive the dial-in conferencing information from the conferencing components when the telephony setting for a user is set to Audio/Video disabled.
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2684739/ )Description of the update for Lync 2010: June 2012
For more information about dial-in conferencing in Lync Server 2010, visit the following Microsoft website:
General information about dial-in conferencing in Lync Server 2010