Change the toll or toll-free numbers on your audio conferencing bridge

When you buy Audio Conferencing licenses, Microsoft is hosting your audio conferencing bridge for your organization. The audio conferencing bridge gives out dial-in phone numbers from different locations so meeting organizers and participants can use them to join Skype for Business or Microsoft Teams meetings using a phone.

In addition to the phone numbers already assigned to your conferencing bridge, you can get additional service numbers (toll and toll-free numbers used for audio conferencing) from other locations and then assign them to the conferencing bridge so you can expand coverage for your users.

Note: To be able to assign/unassign a phone number for a conferencing bridge, the phone number must be a 'service' number. You can see the type of number it is by using the Voice >Phone numbers tab and look under the Number Type column.

Step 1 - Assign the new phone number to your audio conferencing bridge

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

  2. Go to the Office 365 admin center > Admin centers > Skype for Business > Voice > Phone numbers and find the phone number.

  3. Select the phone number from the list and in the Action pane, click Assign.

  4. On the Assign page, click Save.

    Only a service toll number can be set as the default number for your conferencing bridge, service toll-free numbers can’t be set as the default number of your conferencing bridge. If you are assigning a service toll number and you would like to set it as the new default number for your audio conferencing bridge, check Use this number as the default.

    Note: After a new phone number has been assigned, even if the number became the new default number, the default number for existing users won't change. To set the default toll or a toll-free number that is added to an organizer's meeting invites, see Set the phone number that will be used when users join a meeting.

Step 2 - Change the default phone numbers that are included in the meeting invites of users (optional)

The default phone numbers for user are the ones that are included on their meeting invites when they schedule a meeting. For more information, see Set the phone number that will be used when users join a meeting.

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

  2. Go to the Office 365 admin center > Admin centers > Skype for Business > Audio conferencing > Dial-in users and find the users in the list.

  3. Click Edit in the action pane.

  4. Under Default toll number or Default toll-free number, select the number in the list and click Save.

Once the changes have been saved, the new default phone numbers will be included on the meeting invites of organizers the next time they schedule a new meeting.

Step 3 - Update existing meeting invites of users using the Meeting Migration Service (optional)

For these two next steps, you will need to start Windows PowerShell. To see how to do this, click here.

Using the Meeting Migration Service, you can optionally update meeting invites that were already sent to users in your organization before their default phone numbers had been changed. For additional information, see Setting up the Meeting Migration Service (MMS).

  • Run the Meeting Migration Service (MMS) for the users that had their default phone numbers changed in Step 2. To do this, run the following command:

	Start-CsExMeetingMigration user@contoso.com

  • You can also view the meeting migration status. All meetings would be rescheduled once there are no operations in Pending or In-Progress state.

	Get-CsMeetingMigrationStatus -SummaryOnly

When you unassign a phone number from a conferencing bridge, users won't be able to join any meetings using that phone number anymore. Because the phone number is changing, it's important to update all users that could have a phone number as their default number (if any) and to update their existing meeting invites before the phone number is unassigned from the audio conferencing bridge.

If the phone number is removed without updating the users and their meetings, their existing meeting invites could contain a phone number that won’t work for joining their meetings anymore.

For the first three steps, you will need to start Windows PowerShell. To see how to do this, click here.

Step 1 - Update users that have the phone number to be unassigned as one of their default numbers

Replace the default toll or toll-free number for all users that have the number to be unassigned as a default number and start the process of rescheduling their meetings. To do this, run the following command:

Set-CsOnlineDialInConferencingUserDefaultNumber -FromNumber <Number to be removed> -ToNumber <Number to be set as new default> -NumberType <"Toll" or "Toll-Free"> -RescheduleMeetings

Note: Depending on the size of your organization, this could take some time to complete.

You can also change the default toll or toll-free number of users in the Skype for Business admin center, however, this won’t automatically reschedule their meetings. For additional information, see Set the dial-in phone numbers for meeting organizers that are included on invites.

Step 2 - View meeting migration status using Windows PowerShell

All meetings would be rescheduled once there are no operations in Pending or In-Progress state.

Get-CsMeetingMigrationStatus -SummaryOnly

For more information about the Meeting Migration Service, see Setting up the Meeting Migration Service (MMS).

Step 3 - Unassign the old phone number from the audio conferencing bridge

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

  2. Go to the Office 365 admin center > Admin centers > Skype for Business > Voice > Phone numbers and find the phone number.

  3. Select the phone number from the list and in the Action pane, click Unassign.

  4. In the Are you sure you want to unassign this number? window, click Yes.

Important: Once a phone number is unassigned from a audio conferencing bridge, the phone number will no longer be available for users to join new or existing meetings.

To verify that Windows PowerShell is ready to go

Check that you are running Windows PowerShell version 3.0 or higher

  1. To verify that you are running version 3.0 or higher: Start Menu > Windows PowerShell.

  2. Check the version by typing Get-Host in the Windows PowerShell window.

  3. If you don't have version 3.0 or higher, you need to download and install updates to Windows PowerShell. See Windows Management Framework 4.0 to download and update Windows PowerShell to version 4.0. Restart your computer when you are prompted.

  4. You will also need to install the Windows PowerShell module for Skype for Business Online that enables you to create a remote Windows PowerShell session that connects to Skype for Business Online. This module, which is supported only on 64-bit computers, can be downloaded from the Microsoft Download Center at Windows PowerShell Module for Skype for Business Online. Restart your computer if you are prompted.

If you need to know more, see Connect to all Office 365 services in a single Windows PowerShell window.

To start Windows PowerShell

Start a Windows PowerShell session

  1. From the Start Menu > Windows PowerShell.

  2. In the Windows PowerShell window, connect to your Office 365 organization by running:

    Note: You only have to run the Import-Module command the first time you use the Skype for Business Online Windows PowerShell module.

    Import-Module "C:\Program Files\Common Files\Skype for Business Online\Modules\SkypeOnlineConnector\SkypeOnlineConnector.psd1"
    $credential = Get-Credential
    $session = New-CsOnlineSession -Credential $credential
    Import-PSSession $session

If you want more information about starting Windows PowerShell, see Connect to all Office 365 services in a single Windows PowerShell window or Connecting to Skype for Business Online by using Windows PowerShell.

Save time or automate

To save time or automate this, you can use the Set-CsOnlineDialInConferencingUser or theSet-CsOnlineDialInConferencingUserDefaultNumber cmdlets.

  • 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 amos.marble@Contoso.com -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: 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 and automatically reschedule their meetings, run:

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

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

      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.

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