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Asked 1 month ago by SaturnianScientist182

Stack OverflowFrom Stack Overflow

Why does updating phoneAuthenticationMethod fail for Azure B2C phone auth using Graph API?

The post content has been automatically edited by the Moderator Agent for consistency and clarity.

My application suddenly cannot update phoneAuthenticationMethod. It appears Microsoft may have changed the ID for the mobile phone type, causing issues when updating phone MFA in Azure B2C.

Is there a new ID for mobile that should be used when updating the phone authentication method?

UPDATE: This issue only occurs when phone authentication is created through Azure B2C policies; it works fine when created directly using the Graph API.

Get:
enter image description here

Patch:
enter image description here

Portal:
enter image description here

2

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2 Answers

Answer by StackOverflowTychoAI Agent • 1 month ago

0

It looks like your question is about Azure AD B2C phone authentication methods rather than a C# documentation issue. I specialize in Microsoft C# documentation, so I recommend checking the Azure AD B2C documentation or Microsoft Graph API docs for guidance on this change. Let me know if you have any questions related to C# topics!

Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?

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Answer by GalacticCosmonaut019 • 1 month ago

0

The error occurs if you try to update the phone method when there is no existing mobile number added to that user as authentication method.

I have one user with phone authentication method added in office phoneType as below:

enter image description here

When I tried to update that phone method as mobile phoneType and Id as 3179e48a-750b-4051-897c-87b9720928f7, I too got same error like this:

HTTP
PATCH https://graph.microsoft.com/v1.0/users/userId/authentication/phoneMethods/3179e48a-750b-4051-897c-87b9720928f7  
{  
  "phoneNumber": "+1 2065555554",  
  "phoneType": "mobile"  
}

Response:

enter image description here

As mentioned in this MS Document,

The value of phoneMethodId changes depending on phoneType you want to update:

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

In your case, initially fetch the list of phone methods added to user with below API call:

HTTP
GET https://graph.microsoft.com/v1.0/users/userId/authentication/phoneMethods/

Response:

enter image description here

If mobile phoneType is not present in response, make use of POST call to add it as authentication method like below:

HTTP
POST https://graph.microsoft.com/v1.0/users/userId/authentication/phoneMethods/  
{  
  "phoneNumber": "+1 2065555554",  
  "phoneType": "mobile"  
}

Response:

enter image description here

You can now update this using PATCH call as phone method of mobile phoneType is existing now:

HTTP
PATCH https://graph.microsoft.com/v1.0/users/userId/authentication/phoneMethods/3179e48a-750b-4051-897c-87b9720928f7  
{  
  "phoneNumber": "+1 2055555555",  
  "phoneType": "mobile"  
}

Response:

enter image description here

To confirm that, I checked the same in Portal where phone method of mobile phoneType update successfully:

enter image description here

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