With Microsoft Teams, users can call in to Teams meetings using a phone instead of using the Teams app on a mobile device or PC as long as the meeting organizer has been assigned a Teams A5 license. Anyone who has the dial-in number and conference ID can join a Microsoft Teams meeting, unless the meeting organizer has locked the meeting. The meeting organizer has the ability to "mute" meeting attendees if they don't want to hear them.
Teams Audio Conferencing Welcome Email
You will receive the below email when your Teams audio conferencing license is ready for use. The email sender will be “Microsoft Audio Conferencing maccount@microsoft.com”, and the subject line will be “You now have Audio Conferencing for Microsoft Teams or Skype for Business Online – Here is your dial-in information and PIN”:
How to create a Teams Meeting with Audio Conferencing from Microsoft Outlook Calendar
Click “New Teams Meeting” in the Outlook menu bar.
A Calendar appointment will appear. Note that the Teams audio conferencing information for your meeting (the dial in number and Conference ID PIN) has been prepopulated in the body of the Calendar appointment. Enter your attendees and meeting information and click “Send”.
You have successfully created a Teams meeting with audio conferencing from Microsoft Outlook.
For more information on call forwarding and simultaneous ring, please refer to the below articles.
Learn more about joining a meeting on Microsoft Teams