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How to Assign a Toll-Free Number to a Microsoft Teams Auto Attendant

Natalie Taylor Oct 10, 2026 868 views

Question details

The user needs to assign a toll-free number to a Microsoft Teams auto attendant but is unable to find or assign the number in the system.

How to Assign a Toll-Free Number to a Microsoft Teams Auto Attendant

Product: Microsoft Teams
Device & OS: not provided
Scenario: An administrator is configuring a Teams auto attendant and attempting to link a toll-free number to the associated resource account.
Observed behavior: The toll-free number does not appear as an option for assignment, which may be caused by a lack of available numbers, missing resource account licensing, or calling-plan restrictions.

Before you start

Ensure you have Microsoft Teams administrator privileges and that your organization's tenant has an active calling plan that supports toll-free numbers.

Solution 1Recommended

Verify Licensing and Assign Number via Teams Admin Center

Check for available toll-free numbers and ensure the correct licenses are applied before assigning the number to your auto attendant.

A common reason toll-free numbers do not appear is that the resource account linked to the auto attendant lacks the necessary licenses. You must assign a 'Microsoft Teams Phone Resource Account' license to the account first.

Check available numbers

Log in to the Microsoft Teams admin center. Navigate to Voice, then select Phone numbers on the left sidebar to verify if any toll-free numbers are available and unassigned.

Edit the auto attendant

Go to Voice, then select Auto attendants. Select the specific auto attendant you wish to configure and click Edit.

Assign the number

In the auto attendant's resource account settings, click on the number assignment dropdown, select your available toll-free number, and save your changes.

Verify Licensing and Assign Number via Teams Admin Center

Missing Toll-Free Numbers: If there are no toll-free numbers listed in your inventory, you will need to acquire new numbers directly through the Microsoft Teams admin center or contact your telephony carrier.

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Frequently Asked Questions

Why is my toll-free number not appearing in the Teams Admin Center dropdown?

This usually occurs if the toll-free number is already assigned to another resource, if it hasn't been properly ported into your system, or if the associated resource account lacks the required Microsoft Teams Phone Resource Account license.

What license does a Teams auto attendant need to use a toll-free number?

The resource account linked to the auto attendant must be assigned a 'Microsoft Teams Phone Resource Account' license. This license is available at no additional cost for tenants with Teams Phone subscriptions.

How do I get more toll-free numbers for Microsoft Teams?

You can acquire additional toll-free numbers directly through the Microsoft Teams admin center by navigating to Voice > Phone numbers and clicking 'Add', or by submitting a porting request for existing numbers from your current service provider.

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