This feature is not available on Lync for Mac.
The Whiteboard in Lync allows people to collaborate within a creative space. The whiteboard allows for drawing, typing, and inserting images.
Use of the whiteboard should be fairly straightforward. The tools on the right allow you to switch from typing to drawing to inserting images. Additionally, it is possible to paste copied images onto the surface.
Hovering your mouse over any of the tools will provide a description of their function.
The contents of the whiteboard updates for all participants in real-time.
You may wish to save the contents of the whiteboard to review at a later time.