Set the dial-in phone numbers for meeting organizers that are included on invites

Skype for Business dial-in conferencing enables users in your organization to create a Skype for Business Online meeting and then allow users to dial in to it using a phone. In Office 365, you have the option of using a Microsoft dial-in conferencing bridge or to use a third-party audio conferencing bridge that is hosted by an approved audio conferencing provider (ACP).

A conferencing bridge gives you a set of dial-in phone numbers for your organization. All of them can be used to join the meetings that a meeting organizer has created, but you can select which ones will be included on their meeting invites.

Note: There can be a maximum of one toll and one toll-free phone number on the meeting invite for a meeting organizer, but there is also a link located at the bottom of each meeting invite that opens the full list of all dial-in phone numbers that can be used to join a meeting.

Setting the default dial-in phone number for a meeting organizer

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

  2. Choose Admin centers > Skype for Business.

  3. Choose Users.

    In the Skype for Business admin center, choose Users.

  4. Choose which users you want to edit:

    • To select a single user, choose the user’s name.

    • To select all users on the page, check the box next to Display name at the top of the list.

    • To select multiple users, press and hold Ctrl, and then choose the users you want.

  5. In the right panel, choose Edit.

    Choose the edit icon.

  6. In the Provider dropdown box, choose the provider for the user. Depending on the provider, complete the following boxes.

    • Microsoft is the provider: use the Default toll number and Default toll-free number lists to select the default numbers for the user.

      Note: At least one toll-free number must be assigned to your conferencing bridge before it can be set as the default toll-free number of a user. To get a toll-free number, see Getting Skype for Business service phone numbers.

    • A third-party is the provider: use the Toll number and Toll-free number fields to enter the numbers for the user.

Reset dial-in conferencing phone numbers

  1. In the Skype for Business admin center, choose dial-in conferencing.

  2. At the top of the page, choose dial-in users.

  3. Choose the users you want to reset, and then choose Clear.

    Choose Clear to reset phone numbers.

By default, when you change a user's conferencing settings, emails are sent to users. To change this, see Enable or disable sending emails when dial-in conferencing settings change.

Want to know how to manage with Windows PowerShell?

  • To save time or automate this, you can use the Set-CsOnlineDialInConferencingUser cmdlet.

    • Use the Set-CsOnlineDialInConferencingUser cmdlet to change the default toll or toll-free number for specific users.

      • To change the default toll-free number for a user, run:

        Set-CsOnlineDialinConferencingUser –Identity -TollFreeServiceNumber   80045551234
    • Use the Set-CsOnlineDialInConferencingUserDefaultNumber cmdlet to change the default toll or toll-free number of users based on their original default number or their location.

      Note: To find the BridgeID, use the Get-CsOnlineDialInConferencingBridge.

    • To set the default toll-free number for all users without one to 8005551234, run:

      Set-CsOnlineDialInConferencingUserDefaultNumber -FromNumber $null -ToNumber 8005551234 -NumberType TollFree -BridgeId <Bridge Id>  
    • To change the default toll-free number of all users that have 8005551234 as their default toll-free number to 8005551239, run:

      Set-CsOnlineDialInConferencingUserDefaultNumber -FromNumber 8005551234 -ToNumber 8005551239 NumberType TollFree -BridgeId <Bridge Id>
    • To set the default toll-free number of all users located in the U.S. to 8005551234, run:

      Set-CsOnlineDialInConferencingUserDefaultNumber -Country US -ToNumber 8005551234 -NumberType TollFree -BridgeId <Bridge Id>

      Note: The location that is used above needs to match the contact information of user(s) that is set in the Office 365 admin center.

See Also

Set up dial-in or PSTN conferencing in Skype for Business

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