In December, Microsoft updated its Lync app for Windows 8 so it would work with Windows 8.1. Today, the company released a new update for the app that contains quite a few new features for the business-themed messaging and chat program.
The official Lync blog states that the app update now includes a way to manage Lync meeting participants either individually or as a group. The blog says:
You can mute a participant, send a private IM, view their contact card, promote to presenter or demote to an attendee. You can also invite more participants, mute all audience, and admit people to the meeting who are waiting in the lobby.