SignIn B2B guest accounts to B2C through custom policy

code-surgeon 141 Reputation points

Hi there,
We have an Azure AD tenant there are quiet a few B2B guest accounts (some MSA, some on their own tenant). We also have a B2C tenant where we have implemented custom policies with multi-tenant azure ad claims provider (specific tenants, not any azure ad tenant). However, guest accounts to my Azure AD tenant can't login to B2C through the custom policy. If I use one of the builtin flows and add my Azure AD tenant as an OIDC provider, they can login. How can I enable similar experience with my custom policies?

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.
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Accepted answer
  1. Alfredo Revilla (MSFT) 26,756 Reputation points

    Currently this is not possible. To allow guests users to login you will need to individually configure each tenant.

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