Start an audio conference over the phone without a PIN

It might be frustrating for users who dial in to a meeting to be held in the meeting's lobby listening to music because an organizer hasn't started the meeting.

If a meeting organizer calls into their meeting, by default, a PIN is required to start a meeting. You can set it up so that anyone can dial in to the meeting and not be prompted for a PIN to start the meeting. You can set it up so when a single user or when all of your dial-in users in your organization can start meetings without a PIN. You can use the Skype for Business admin center to enable or disable this setting for a single user.

A PIN isn't required for the meeting organizer if someone has started the meeting from a Skype for Business client. A PIN is only required when a meeting organizer joins their meeting over a phone. The PIN for meetings is sent to the dial-in user when they are assigned the Skype for Business PSTN Conferencing license or are enabled for dial-in conferencing. See, Send an email to a user with their dial-in conferencing information and Emails that are automatically sent to users when their settings change.

Enable or disable anonymous callers from joining a meeting

  1. Sign in to Office 365 with your work or school account.

  2. Go to the Office 365 admin center > Skype for Business.

  3. In the Skype for Business admin center, in the left navigation go to Dial-in conferencing > Dial-in users.

  4. In the list select the user and on the Action pane click Edit.

  5. On the user's properties page, under Meeting options, check or uncheck Allow unauthenticated callers to be the first people in a meeting. If not, then they will wait in the lobby until an authenticated user joins.

  6. Click Save.

To enable or disable anonymous callers to all of your user's meetings using Windows Powershell
  • Run the following:

    Set-CsOnlineDialInConferencingTenantSetting -AllowPSTNOnlyMeetingsByDefault $true | $false

What else should you know?

  • If you want to reset the PIN, see Reset the dial-in conferencing PIN for a user.

  • If anonymous access or not requiring a PIN to start a meeting is enabled:

    • If the meeting hasn't started (there's no one in the meeting yet):

      A caller will be prompted if he's the organizer, if he says yes, he'll be prompted for his PIN after he inputs the PIN, the meeting will start and the user will join the meeting.

    • If the meeting already started (someone else is already in the meeting):

      A caller won't be prompted if he's the organizer and he'll never be prompted for the PIN, the meeting is already started, the caller will join it.

  • If anonymous access or not requiring a PIN to start a meeting is disabled:

    • If the meeting hasn't started (there's no one in the meeting yet):

      A caller won't be prompted if he's the organizer and he'll never be prompted for the PIN. Because the setting of the organizer is set to off, the meeting will start and the anonymouscallers will join the meeting.

    • If the meeting already started (someone else is already in the meeting):

      A caller won't be prompted if he's the organizer and he'll never be prompted for the PIN, the meeting is already started, the caller will join it.

Want to know how to manage with Windows PowerShell?

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