Microsoft Entra ID will support passkey registration and sign-in for B2B users to meet resource tenant MFA requirements, enhancing phishing resistance. This feature, enabled by default, rolls out from October 2026 to February 2027, requiring no admin action but recommending policy reviews to align user scopes and MFA settings.
Applies to: Microsoft Entra
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).