Azure AD B2C, phone sign-up/sign-in and SMS fees

Veli-Jussi Raitila 296 Reputation points

The pricing documentation for Azure AD B2C only refers to the additional "per authentication attempt" fees for SMS in the context of MFA. However, one can also enable phone sign-up/sign-in whereas the authentication is, or can be, essentially single factor.

I assume the SMS fees also apply in this case? If so, I think the documentation should reflect that (i.e. not only applicable when relying on multiple factors).

Azure Active Directory External Identities
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Accepted answer
  1. Akshay-MSFT 3,956 Reputation points Microsoft Employee

    @Veli-Jussi Raitila ,

    Thank you for posting your query on Microsoft Q&A. If you are opting for password less signin, then

    Phone/SMS is often used as a verification step and this falls outside of the regular MFA traffic hence won't be charged by Microsoft.

    However if any cost is associated by you network operator for receiving these OTP, that would be applicable by your network provider and not by Microsoft.

    Microsoft only has an additional billing for MFA Phone/SMS.

    Please do let me know if there are any further queries.


    Akshay Kaushik

    Please "Accept the answer" (Yes/No), and share your feedback if the suggestion does clarify your query. This will help us and others in the community as well.

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