In Set-CsMeetingConfiguration, you can define the following parameters On Skype for Business Server, administrators can choose to have users meetings always default to a new unique meeting space.

So they may be configured for a static dedicated meeting space, but use new meeting spaces for important or sensitive meetings. Users can elect to create “new meeting space” (sometimes referred to as “private”) in their meeting options for particular meetings, which creates a dynamic one-time meeting URL and conference ID. With Skype for Business having a roster of users on the call, people “camping” on the line is usually less of a concern. This makes it really easy for users to join meetings and remember PSTN ID’s, but can be considered a security risk as anyone that knows the PIN could join/meetings can overlap. By default, users have a single static meeting URL and PSTN Conference ID (their “dedicated meeting space”, sometimes referred to as “public”), every meeting they create use the same URL and ID. In Skype for Business Server (and Lync Server 2013). The per user join PIN is assigned by the system by default, on Skype for Business Server it can be set/reset on the page after doing AD authentication:

Each user has a personal numeric PIN to authenticate themselves to the conference if joining via PSTN, mostly users don’t authenticate and join as anonymous on PSTN unless authentication is forced.

The numeric “PSTN” Conference ID (referred to as the PSTN Conference ID for ease).

The alphanumeric conference ID in the URL (referred to as the Meeting URL for ease).

In Skype for Business Server and Online (or Lync 2013 / Lync Online), there are some differences to the defaults and settings around Conference ID’sįirst off, when we talk about Skype for Business there are two conference ID’s, and a per user join PIN

Skype online meeting