Azure B2C User Flow to allow user to update MFA phone number

Question

The users are signing up with email address as their login and SMS for MFA when they sign up. I cannot find a way to allow the user to edit their own MFA phone number after signing up for an account. The Edit Profile flow does not have phone number as an option, only fields like Name, City, Postal Code, Job Title, Country/Region, etc are available, phone and email address are not choosable. The Forgot Password flow allows them to change their email address. I cannot find anywhere to allow a user to edit their MFA phone number. I am not using custom policies, just user flows.

Answer 1

Since the only user flows we have are the ones listed under user flows within B2C, the option for B2C users to update their MFA settings via user flows is not yet available. I have shared feedback with the product team though to include this, and you can also leave a request for this in the feedback forum. https://feedback.azure.com/

I will also update this thread if I receive any new information.

You need to use a custom policy to allow users to edit their MFA phone numbers, and the sample and documentation are available here: https://github.com/azure-ad-b2c/samples/tree/master/policies/edit-mfa-phone-number

Let me know if this helps and if you have further questions.

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