You can join a Microsoft Lync Online communications software meeting from a computer that does not have Lync Online or Microsoft Lync 2010 Attendee communications software installed.

When you open the email meeting invitation on the computer without Lync installed, and then click the Join online meeting link, you see one or more of the following choices, depending on how your organization—or the organization of the person who scheduled the meeting—is configured:

Join option

Alternate meeting client

Join the meeting using your web browser

Microsoft Lync Web App

Important:  Lync Web App requires the most current version of Microsoft Silverlight. If Silverlight is not already installed, you must have administrator privileges to install it.

Download and install Lync Attendee

Microsoft Lync 2010 Attendee

Note:  If Lync Online or Lync 2010 Attendee is already installed on your remote computer, Lync opens automatically as soon as you click on the meeting join link even if you’re not connected directly to your organization’s network.

The following table describes the features and requirements of each of the alternate meeting clients.

Feature or requirement

Lync Web App

Lync 2010 Attendee (Windows only)

Web application



Installation requirements

Silverlight; if not present, requires administrator privileges to install.

Can be installed without administrator privileges; does not require a separate installation of Silverlight.

Integrated audio and video

No (see following note)


Join using your network credentials




  • Lync Web App does not include integrated audio and video. It supports all the Lync Online conferencing features except uploading files that are created by using Microsoft PowerPoint presentation graphics program. Additionally, installation of a Microsoft ActiveX control is required for desktop or application sharing. When you join a meeting using Web App, you will appear as a Guest in the participant list.

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