A customer wanted all their Skype Meetings public: no Lobby, no restrictions. Possible, but risky for security. Here's why (and how to do it anyway).

Meetings (also called conferences) are an integral part of Skype for Business Server. The CsMeetingConfiguration cmdlets enable administrators to control the type of meetings that users can create and to determine how meetings deal with anonymous users and dial-in conferencing users. For example, you can configure meetings so that anyone dialing in over the public switched telephone network (PSTN) is automatically admitted to the meeting. Alternatively, you can configure meetings so that dial-in users are not automatically admitted the meeting, but are instead routed to the meeting lobby. These dial-in users remain on hold in the lobby until a presenter admits them to the meeting. As noted previously, these settings only affect scheduled meetings; they do not affect ad-hoc meetings created by clicking Meet Now in Microsoft Lync. When you create a meeting by clicking Meet Now, participant access is automatically open to all everyone and anonymous users can join the meeting without having to wait in the lobby.…