Microsoft announced on Friday, August 12th that Dynamic Conference IDs are coming September 1st to Office 365 E5 PSTN Conferencing.
This is an important because it solves a privacy limitation with the current static conference ID’s in service today.
Without dynamic conference IDs, there are no great options to prevent new external callers from interrupting an in-progress meeting (that may be running long). The default ‘out of box’ configuration allows unauthenticated external callers to be admitted into the conference. The option to override this behavior is to change the policy ‘these people don’t have to wait in the lobby’ to “Only me, the meeting organizer.”
However, when that option is selected, the meeting organizer does not receive any pop-up notification to admit PSTN callers who are waiting in the lobby (they just sit there forever). This particular scenario is not directly mentioned in the “Dial-in conferencing known issues” support article. And that is why Dynamic conference IDs will be such a great thing starting September 1st! Note: Any previously scheduled meeting will not automatically have this option, only new scheduled meetings going forward after 9/1 will have this option. Also, any recurring meetings will need to be rescheduled with a new dynamic conference ID to benefit from this privacy feature.