Delete phoneAuthenticationMethod

Namespace: microsoft.graph

Delete a user's phone authentication method. This removes the phone number from the user and they'll no longer be able to use the number for authentication, whether via SMS or voice calls.

A user can't have an alternateMobile number without a mobile number. If you want to remove a mobile number from a user that also has an alternateMobile number, first update the mobile number to the new number, then delete the alternateMobile number.

If the phone number is the user's default Azure multi-factor authentication (MFA) authentication method, it can't be deleted. Have the user change their default authentication method, and then delete the number.

This API is supported in the following national cloud deployments.

Global service US Government L4 US Government L5 (DOD) China operated by 21Vianet


One of the following permissions is required to call this API. To learn more, including how to choose permissions, see Permissions.

Permissions acting on self

Permission type Permissions (from least to most privileged)
Delegated (work or school account) UserAuthenticationMethod.ReadWrite
Delegated (personal Microsoft account) Not supported.
Application Not supported.

Permissions acting on other users

Permission type Permissions (from least to most privileged)
Delegated (work or school account) UserAuthenticationMethod.ReadWrite.All
Delegated (personal Microsoft account) Not supported.
Application UserAuthenticationMethod.ReadWrite.All

For delegated scenarios where an admin is acting on another user, the administrator needs at least the Authentication Administrator or Privileged Authentication Administrator Azure AD role.

HTTP request

Delete your own phone authentication method.

DELETE /me/authentication/phoneMethods/{phoneMethodId}

Delete your own or another user's phone authentication method.

DELETE /users/{id | userPrincipalName}/authentication/phoneMethods/{phoneMethodId}

The value of phoneMethodId corresponding to the phoneType to delete is one of the following:

  • b6332ec1-7057-4abe-9331-3d72feddfe41 to delete the alternateMobile phoneType.
  • e37fc753-ff3b-4958-9484-eaa9425c82bc to delete the office phoneType.
  • 3179e48a-750b-4051-897c-87b9720928f7 to delete the mobile phoneType.

Request headers

Name Description
Authorization Bearer {token}. Required.

Request body

Don't supply a request body for this method.


If successful, this method returns a 204 No Content response code. It doesn't return anything in the response body.



Here's an example of the request.



Here's an example of the response.

HTTP/1.1 204 No Content