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

When you open the email meeting request on the computer that does not have 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 the Microsoft Silverlight browser plug-in. If Silverlight is not already installed, you must have administrator privileges to install it.

Use Communicator

Microsoft Office Communicator 2007 R2 or Microsoft Office Communicator 2007

Note: If you’re working off-site and Lync or Attendee is installed on your remote computer, Lync opens automatically when you click the Join online meeting 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

Attendee (Available for Windows only)

Office Communicator 2007 R2 or Office Communicator 2007 (Available for Windows only)

Allows web access




Requires Silverlight or administrator privileges to install

Silverlight; if not present, requires administrator privileges to install

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

Not applicable; must be already installed

Includes the new Microsoft Lync Server 2010 conferencing features

Yes (see note below)



Allows dial-in conferencing

Yes (see note below)

Yes (see note below)

Office Communicator 2007 R2 only

Provides integrated audio and video




Allows you to join meetings using your network credentials





  • Lync Web App does not include integrated audio and video. It supports all of the new Lync Server 2010 conferencing features except uploading files that are created by using Microsoft PowerPoint presentation graphics program. In addition, installation of a Microsoft ActiveX control is required for desktop or program sharing.

  • Dial-in conferencing includes the option (if configured by your organization) of connecting to the meeting by having Lync Server call you.

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