Enhancing conferencing security

Conferencing, in Lync Server 2013, has the same default security configuration that we had in Lync Server 2010. Justin Morris, in a post dedicated to Lync Server 2010 conferencing (http://www.justin-morris.net/understanding-conference-security-in-lync-server-2010/), pointed out some of them, including the fact that every Lync user has a meeting URL and a conference ID that never changes by default, and that users invited to a meeting using a PSTN line have the ability to bypass the lobby. If we always use the same conference ID, people outside our company whom we have invited in the past could use it with malicious motivations, or different (unrelated) conferences with different people could merge if our time schedule is not perfect. We will list some steps to improve conferencing security, including a couple of cmdlets from the previously mentioned post.