Join from a computer without Lync Online installed

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 Yes No
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) Yes
Join using your network credentials No No


  • 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.

Applies to:
Lync 2010 for Office 365