Hi @X-Box-11-2021
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.
For pricing info, see Pricing for Audio Conferencing.
Please how to set up Audio Conferencing for Microsoft Teams:
Step 1: Find out if Audio Conferencing is available in your country/region
Step 2: Get and assign licenses
Step 3: Get service numbers for your conferencing bridges
Step 4: Assign a service number to the conferencing bridge
Step 5: Set the default and alternate languages for a conferencing bridge
Step 6: Set your conferencing bridge settings
Step 7: Assign dial-in phone numbers for users who lead meetings
Step 8: Set up meeting invitations (optional)
Please refer to this document for details.
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