GA
Sign-in with username/alias
In Microsoft Entra External ID (EEID), users who authenticate with a local email and password now can also sign in using a username (alias) as an alternate sign-in identifier. This alias can represent a customer or member ID, insurance number, frequent flyer number, or a self-chosen username. The alias can be collected from user or assigned during self-service sign-up, or assigned during user creation or user update via the Microsoft Graph API or Microsoft Entra admin center. For details, see Si
Affected: Microsoft Entra ID, B2C - Consumer Identity Management