UC Extend expands on the capabilities of the Lync and Skype for Business clients, and best of all its free! UC Extend's vision is to build in functionality to extend the features of the Microsoft UC client, improve user adoption by delivering
managed learning, improve customer satisfaction and make administration of non-domain joined machines easier.
Visit the applications homepage for further information - http://www.lync.geek.nz/p/uc-extend.html
These features can be made more clear by taking a look at there settings: