One-time passcode authentication for B2B guest users - Microsoft Entra External ID

How to use Email one-time passcode to authenticate B2B guest users without the need for a Microsoft account.

The complex world of external sharing and access in Microsoft 365

Mandatory one-time password is coming, are you ready? – Set

Govern access for external users in entitlement management

Azure AD B2B Collaboration Archives - Office 365 for IT Pros

Tutorial - multifactor authentication for B2B - Microsoft Entra

Azure AD External Identities with SAML IdP part 1 of 2 – Set

New Azure AD External Identities Features

Properties of a B2B guest user - Microsoft Entra External ID

Tutorial - multifactor authentication for B2B - Microsoft Entra