What Does AllowLargeMeetings parameter actually does?

One of the new options in Lync 2013 is enabling a Conferencing Policy to support large meetings using the following parameter -AllowLargeMeetings.

Unfortunately, the TechNet documentation, does not contain too much of information about the actual implications settings this parameter does:

When set to True, all online meetings are treated as “large meeting.” With a large meeting, restrictions are placed on the number of notifications that are sent to participants as well as the size of the meeting roster that is transmitted by default.

The default value is False ($False).

Recently, Microsoft released a document describing how to Manage Large and Structured Meetings with Lync 2013, this document explains in details what does the AllowLargeMeeting implications are:

  • Hides the Attendee roster. For more information, see the Roster Management section of this document.
  • Disables errors in the IM window.
  • Disables multi-party video.
  • Disables ability to promote an Attendee to Presenter. You must plan ahead and declare all Presenters before the meeting.
  • Disables ability to unmute individual Attendees.
  • Disables ability to apply the Lock Video Spotlight feature to Attendees.


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  4. Adam Jacobs

    Hi Guy, it’s also worth noting that this mode hides the lobby controls also. It’s not clear to me whether this is by design or a bug as meeting that are scheduled where lobby is enabled leaves you in scenario whereby attendees cannot be permitted.


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