Enhancing Security in Azure AD B2C: Integrating Second Layer Authentication in .NET Core Applications

[Vijaykumarj]

I am utilizing an Azure AD B2C tenant with a local account identity provider for my application. Within my application, I have implemented custom screens for both sign-in and sign-up processes. Initially, I successfully managed user creation (sign-up) and authentication (sign-in) through the MS Graph API. Now, I aim to enhance the security of these processes by incorporating a second layer of verification, such as sending SMS messages with verification codes directly from my .NET Core application using the Graph API post successful user sign-in. While I have referenced various articles, they lack clear guidance on implementing this functionality. How can I accomplish this?