Hello @Likitha Bommasani ,
Thank you for reaching out Microsoft Q&A.
By default, integrating Entra ID for automatic user registration during an application's sign-up process is not possible, as Entra ID primarily handles secure authentication, not sign-up flows. It is designed specifically for authentication and authorization, verifying user identities and issuing tokens to allow secure access to applications. Its main purpose is to ensure that only authorized users, who are already present in Entra ID, can access your application. To onboard a new user, you must first create the user in Entra ID only then will they be able to access your application.
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Goutam Pratti.