GA
High Scale Compatibility (HSC) mode for Microsoft Entra External ID
From Microsoft's description: “High Scale Compatibility (HSC) mode enables organizations to migrate to Microsoft Entra External ID while preserving their existing user directory.”
High Scale Compatibility (HSC) mode enables organizations to migrate to Microsoft Entra External ID while preserving their existing user directory. It's designed for large, established customer identity platforms transitioning from Azure AD B2C.
Affected: Microsoft Entra ID, B2C - Consumer Identity Management