You can't change a phone's type. To change a phone's type, add a new number of the desired type and then delete the object with the original type.
If a user is enabled by policy to use SMS to sign in and the mobile number is changed, the system will attempt to register the number for use in that system.
Choose the permission or permissions marked as least privileged for this API. Use a higher privileged permission or permissions only if your app requires it. For details about delegated and application permissions, see Permission types. To learn more about these permissions, see the permissions reference.
Permission type
Least privileged permissions
Higher privileged permissions
Delegated (work or school account)
UserAuthenticationMethod.ReadWrite.All
UserAuthenticationMethod.ReadWrite
Delegated (personal Microsoft account)
Not supported.
Not supported.
Application
UserAuthenticationMethod.ReadWrite.All
Not available.
For delegated scenarios where an admin is acting on another user, the administrator needs at least the Authentication Administrator or Privileged Authentication AdministratorMicrosoft Entra role.
Users cannot update their own phone authentication method.
HTTP request
Update another user's phone authentication method.
In the request body, supply the values for relevant fields that should be updated. Existing properties that are not included in the request body will be recalculated based on changes to other property values.
Property
Type
Description
phoneNumber
String
The phone number to text or call for authentication. Phone numbers use the format +{country code} {number}x{extension}, with extension optional. For example, +1 5555551234 or +1 5555551234x123 are valid. Numbers are rejected when creating or updating if they do not match the required format.
phoneType
string
Possible values are: mobile, alternateMobile, or office.
Response
If successful, this method returns a 204 No Content response code and an updated phoneAuthenticationMethod object in the response body.
// Code snippets are only available for the latest version. Current version is 5.x
// Dependencies
using Microsoft.Graph.Models;
var requestBody = new PhoneAuthenticationMethod
{
PhoneNumber = "+1 2065555554",
PhoneType = AuthenticationPhoneType.Mobile,
};
// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=csharp
var result = await graphClient.Users["{user-id}"].Authentication.PhoneMethods["{phoneAuthenticationMethod-id}"].PatchAsync(requestBody);
// Code snippets are only available for the latest major version. Current major version is $v1.*
// Dependencies
import (
"context"
msgraphsdk "github.com/microsoftgraph/msgraph-sdk-go"
graphmodels "github.com/microsoftgraph/msgraph-sdk-go/models"
//other-imports
)
requestBody := graphmodels.NewPhoneAuthenticationMethod()
phoneNumber := "+1 2065555554"
requestBody.SetPhoneNumber(&phoneNumber)
phoneType := graphmodels.MOBILE_AUTHENTICATIONPHONETYPE
requestBody.SetPhoneType(&phoneType)
// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=go
phoneMethods, err := graphClient.Users().ByUserId("user-id").Authentication().PhoneMethods().ByPhoneAuthenticationMethodId("phoneAuthenticationMethod-id").Patch(context.Background(), requestBody, nil)
// Code snippets are only available for the latest version. Current version is 6.x
GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);
PhoneAuthenticationMethod phoneAuthenticationMethod = new PhoneAuthenticationMethod();
phoneAuthenticationMethod.setPhoneNumber("+1 2065555554");
phoneAuthenticationMethod.setPhoneType(AuthenticationPhoneType.Mobile);
PhoneAuthenticationMethod result = graphClient.users().byUserId("{user-id}").authentication().phoneMethods().byPhoneAuthenticationMethodId("{phoneAuthenticationMethod-id}").patch(phoneAuthenticationMethod);
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