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A vast quantity of features exist within the Lync Web App, such as the whiteboard and as seen here, the poll function. The Lync Web App is entirely Silverlight based, so the functionality is not only rich and user aesthetically pleasing, but it is scalable and expandable and available on a vast number of platforms - even non-Windows.
This is still the Lync Web App, but it looks almost identical to that of the desktop client. Here, the aforementioned poll is conducted across the board of the meeting, This 'sharing' area can include the whiteboard as well as poll functions, and sharing of documents and PowerPoint presentations.
And this is the final screenshot in this gallery, showing the closing of the Lync Web App.