Set up Audio Conferencing for Skype for Business and Microsoft Teams

Sometimes people in your organization will need to use a phone to call into a meeting. Skype for Business and Microsoft Teams includes the audio conferencing feature for just this situation! People can call into Skype for Business or Microsoft Teams meetings using a phone, instead of using the Skype for Business or Microsoft Teams app on a mobile device or PC. If you don't know much about Audio Conferencing, you can watch .this video.

You only need to set up Audio Conferencing for people who plan to schedule or lead meetings. Meeting attendees who dial-in don't need any licenses assigned to them or other setup.

If you need to better understand and plan for Audio Conferencing before you do even do the steps below, watch this video.

Step 1: Buy and assign licenses

You must be an Office 365 global admin to perform this step.

  1. Find out if Audio Conferencing in Office 365 is available in your country/region. Check this list of countries/regions.

  2. Learn which licenses you need to buy for audio conferencing, and how much they will cost. See Skype for Business and Teams add-on licensing, and buy the licenses.

  3. Assign the Office 365 or Skype for Business licenses you purchased to the people in your organization who are going to schedule or lead meetings.

  4. If you purchased Audio Conferencing add-on licenses and Communications Credits licenses, assign them, too. For instructions, see Assign Skype for Business licenses.

Step 2: Decide on your audio conferencing provider

A audio conferencing provider supplies a audio conferencing bridge. The conferencing bridge sets your dial-in phone numbers, PINs and conference IDs for meetings. Decide whether to use Microsoft or a third-party audio conferencing provider:

Note: Microsoft Teams users can't user a third-party audio conferencing provider.

  • Microsoft as your audio conferencing provider: If you want the easiest solution for audio conferencing, choose Microsoft as your audio conferencing provider.

  • Third-party as your audio conferencing provider: If you are in a country where Audio Conferencing isn’t available, the service quality isn’t great because of it's location, or you have an existing contract, choose a third-party audio conferencing provider. To find a provider, go to Microsoft PinPoint.

Tip: In your organization, you can have some people who use Microsoft as their audio conferencing provider, and others who use a third-party provider. But this will be more complicated for you to setup and manage.

For a detailed comparison between Microsoft as your audio provider and a third-party, see Compare audio conferencing providers.

Step 3: Assign the audio conferencing provider to people who lead or schedule meetings

Now that you've decided on your audio conferencing provider, you need to assign the provider to people in your organization who lead or schedule meetings. Do one of the following:

Step 4: Set up meeting invitations

The following steps are optional, but a lot of admins like to do them:

  1. Customize your meeting invitations. The dial-in numbers that are set for the user will be automatically added to the meeting invitations that are sent to attendees. However, you can add your own help and legal links, a text message, and small company graphic.

  2. Select a different default phone number for each user. This is the phone number that will show up in the meeting that is scheduled by the user.

  3. Set auto attendant languages that the audio conferencing auto-attendant uses to greet a caller when they dial into a audio conferencing phone number. This step only applies if you're using Microsoft as your audio provider.

  4. Set the length of the PIN for audio conferencing meetings.

Frequently asked questions

Following are some of the top questions we get from our customers who want to use audio conferencing.

Calling in to meetings is very useful when people are on the road, for example, and can't attend a meeting using the Skype for Business or Microsoft Teams app on their laptop or mobile devices. But there are other reasons why using a phone to attend a Skype for Business or Microsoft Teams meeting can be a better option than using an app on a computer:

  • Internet connectivity is limited.

  • A meeting is audio only.

  • The person tried to join a Skype for Business meeting and it failed.

  • The call quality is better if they dial-in.

  • People can join a meeting "hands free" using Bluetooth devices.

  • People find it’s easier and more convenient for their situation.

Anyone who has the dial-in number and conference ID can join a Skype for Business or Microsoft Teams meeting, unless the meeting organizer has locked the meeting.

Whether you're calling in using a phone or the Skype for Business or Microsoft Teams apps, you'll be able to hear everyone else on the call, and they can hear you. The meeting organizer has the ability to "mute" meeting attendees if they don't want to hear them.

Yes, toll-free phone numbers (service numbers) are available but only in some countries/regions. To see a list of the numbers that are available, go here.

There are local dial-in numbers that are assigned to you when you purchase the licenses for Audio Conferencing. The dial-in numbers will be included in the meeting invite. These local numbers will be only available to your organization. The phone assigned to your organization and that number is shared by the users within that organization that are enabled for Audio Conferencing. So, Skype for Business or Microsoft Teams meetings scheduled by User A and another User B will both have the same dial-in number.

Local dial-in numbers, and also in some cases international dial-in numbers from the country where your organization is located, will be included on the meeting invite. If a meeting attendee uses a different number that is include in the invite, it will be a shared phone number.

For a current list of countries/regions, see Phone numbers for audio conferencing.

If phone numbers for audio conferencing aren't available in your area or don't meet the needs of your organization, please send us feedback at SkypeFeedback forums.

The maximum length of time depends on who is in the meeting and the type of authentication they used to join the meeting.

Meeting attendees

Meeting end time

There are users that have joined using a Skype for Business or Microsoft Teams app or have dialed-in to the meeting.

The meeting ends if there are no changes to the attendee list after 24 hours.

All of the users are dialed in to the meeting but someone has used a PIN to enter the meeting.

The meeting ends after 24 hours.

All of the users are dialed in to the meeting but there wasn't anyone that used a PIN to enter the meeting.

The meeting ends after 4 hours.

Audio conferencing allows up to 250 phone attendees.

To find out about meeting limits, see Skype for Business Online Limits.

We added a new feature that allows you - the admin - to send and update audio conferencing information and PIN in email. To learn more about it, including how to disable it, see Enable or disable sending emails when audio conferencing settings change.

We're not quite there. However, you can continue to use audio conferencing that is available in Skype for Business Server 2015 along with a PSTN gateway for your on-premise users.

Skype for Business and Microsoft Teams users will be randomly assigned conferencing IDs and can't reserve or set a static conference ID that only they can use.

There isn't support currently for users enabled for Audio Conferencing to join a Skype Meeting Broadcast.

No, a user can't get any operator assistance or support by pressing *0 during the meeting. If there are issues with Audio Conferencing, an administrator for an organization can contact Microsoft support for Office 365.

A Skype for Business or Microsoft Teams user can find the conference ID that is assigned to them by scheduling a meeting in Outlook and Outlook on the web. Also, users can find the conference ID in the email that will be sent to them after they are set up for audio conferencing.

Note: Users won't be able to reset their conference ID. The conference ID can only be reset by you - the admin - for the organization.

We are working on a solution that will let the user will be able access and reset a conference ID without help from an organization's admin.

The Skype for Business or Microsoft Teams user can find the PIN in an email that will be sent to them once they are set up for audio conferencing.

Note: A Skype for Business or Microsoft Teams user won't be able to reset their PIN. The PIN can only be reset by you, the admin. When a PIN is reset an email is sent to the user.

We are working on a solution that will let the user will be able to access and reset a PIN without help from a organization's administrator.

  • *6 (Mute/unmute themselves)

  • *1 (Plays the descriptions of dial-pad commands that are available.)

Yes, attendees can dial-out internationally and invite other callers into a Skype for Business or Microsoft Teams meeting. See Dialing out from a meeting so other people can join it.

When a user is assigned a Audio Conferencing license and the user creates a new Skype for Business or Microsoft Teams meeting in Outlook or Outlook on the web, the dial-in phone numbers and conferencing IDs are added to the meeting invite automatically.

When a user is assigned a Audio Conferencing license, the user is assigned what is called a reservation-less conference ID. This conference ID can be shared along with the conference access phone numbers with meeting attendees without the user having to schedule a meeting.

Here is a table that has the scenarios when the organizer and all of the attendees dial in to a meeting:

User's setting

Organizer steps

Attendee steps

Don't allow anonymous users to start a meeting

  • Dial the audio conferencing phone number.

  • Enter the conference ID.

  • Enter the PIN for the meeting.

  • Dial the audio conferencing phone number.

  • Enter the conference ID.

If the meeting organizer hasn't joined the meeting yet, the attendee will listen to music in the lobby until the organizer joins the meeting.

Allow an anonymous user to start a meeting

  • Dial the audio conferencing phone number.

  • Enter the conference ID.

  • Dial the audio conferencing phone number.

  • Enter the conference ID.

If the attendee joins the meeting before the organizer, each attendee can start the meeting.

Note: This feature is not yet available to customers using Office 365 operated by 21Vianet in China. To learn more, see Learn about Office 365 operated by 21Vianet.

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See Also

Set up Skype for Business Online

Phone numbers for Audio Conferencing

Set options for online meetings and conference calls

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