Why can user not sign up through Microsoft Entra Id sign in and sign up user flow?

Marc Rufer 120 Reputation points MVP
2023-10-11T21:39:34.2833333+00:00

We set up a sign up and sign in user flow in Microsoft Entra Id for external identities. Users of Tenant A could successfully sign up. However one user couldn't. When trying to login, the user gets the error, that Account does not exist in tenant. After clicking in create new, the user gets the MFA challenge of tenant A but after successful MFA he gets then redirected to the before mentioned login page with the error message that the account dies not exist in the tenant.

No guest user got created and I could not find any details in the logs.

Microsoft Entra External ID
Microsoft Entra External ID
A modern identity solution for securing access to customer, citizen and partner-facing apps and services. It is the converged platform of Azure AD External Identities B2B and B2C. Replaces Azure Active Directory External Identities.
3,130 questions
Microsoft Entra
Microsoft Entra
A group of Microsoft multicloud identity and access solutions.
2,550 questions
{count} votes

Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.