Azure Active Directory is available as an identity provider option for B2B collaboration by default. If an external guest user has an Azure AD account through work or school, they can redeem your B2B collaboration invitations or complete your sign-up user flows using their Azure AD account. This technical blog post shows you how to permit guest users to sign in with their Azure AD account, verify publishers’ domain and walks you through next steps. Read it for a quick demo.
Add Azure Active Directory (Azure AD) as an identity provider for External Identities
