Migrating from Azure AD B2C to Microsoft Entra External ID: Applications, Authentication Methods, Branding and Users (Part 1)
Why migrate? Azure AD B2C has served customer identity and access management (CIAM) needs well for years (XML Custom Policy Framework as powerful solution - but hard to learn and maintain), but Microsoft Entra External ID is its successor — bringing native Entra capabilities, modern built-in authentication patterns (passkeys, federation, native authentication SDKs), and direct integration with Entra governance and Conditional Access. If you run B2C today, migrating positions you for a stronger security posture, simpler access policies, and the latest authentication innovations. ...