Consider the following scenario:
- You deploy the dial-in conferencing capabilities in a Microsoft Lync Server 2010 environment, or in a Microsoft Lync Online environment.
- You configure the telephony setting of a Lync 2010 user to Audio/Video disabled.
- The user opens a Microsoft Outlook meeting invitation.
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.