Updates

Author: OWinfreyATL

articles/active-directory/fundamentals/whats-new.md

@@ -44,6 +44,18 @@ The My Security Info management portal ([My Sign-Ins | Security Info | Microsoft
 
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+### Public Preview - Device-bound passkeys as an authentication method
+
+**Type:**  Changed feature            
+**Service category:**  Authentications (Logins)                                
+**Product capability:**  User Authentication                        
+
+Beginning January 2024, Microsoft Entra ID will support [device-bound passkeys](https://passkeys.dev/docs/reference/terms/#device-bound-passkey) stored on computers and mobile devices as an authentication method in preview, in addition to the existing support for FIDO2 security keys. This enables your users to perform phishing-resistant authentication using the devices that they already have.  
+ 
+We will expand the existing FIDO2 authentication methods policy and end user registration experience to support this preview release. If your organization requires or prefers FIDO2 authentication using physical security keys only, then please enforce key restrictions to only allow security key models that you accept in your FIDO2 policy. Otherwise, the new preview capabilities will enable your users to register for device-bound passkeys stored on Windows, macOS, iOS, and Android. Learn more about FIDO2 key restrictions [here](../authentication/howto-authentication-passwordless-security-key.md).
+
+---
+
 ### General Availability - Authenticator on Android is FIPS 140 compliant
 
 **Type:**  New feature