How to Force Using the Lync Web App
If you have the Lync 2010 client installed it will automatically launch when you click to join a meeting using the meeting URL. If you don't have Lync 2010 installed you will see a Microsoft Lync 2010 join page similar to the following: From this
Read More...
Read the complete post at http://www.expta.com/2011/12/how-to-force-using-lync-web-app.html