[AzureAD] Add Azure AD and hybrid auth links

Author: iainfoulds

articles/active-directory/authentication/howto-authentication-passwordless-security-key-on-premises.md

@@ -6,7 +6,7 @@ services: active-directory
 ms.service: active-directory
 ms.subservice: authentication
 ms.topic: conceptual
-ms.date: 01/30/2020
+ms.date: 03/09/2020
 
 ms.author: iainfou
 author: iainfoulds
@@ -47,6 +47,7 @@ Organizations must also meet the following software requirements.
 
 - Devices must be running Windows 10 Insider Build 18945 or newer.
 - You must have version 1.4.32.0 or later of [Azure AD Connect](../hybrid/how-to-connect-install-roadmap.md#install-azure-ad-connect).
+  - For more information on the available Azure AD hybrid authentication options, see [Choose the right authentication method for your Azure Active Directory hybrid identity solution](../../security/fundamentals/choose-ad-authn.md) and [Select which installation type to use for Azure AD Connect](../hybrid/how-to-connect-install-select-installation.md).
 - Your Windows Server domain controllers must have the following patches installed:
     - For Windows Server 2016 - https://support.microsoft.com/help/4534307/windows-10-update-kb4534307
 	- For Windows Server 2019 - https://support.microsoft.com/help/4534321/windows-10-update-kb4534321
@@ -197,4 +198,4 @@ Make sure enough domain controllers are patched to respond in time to service yo
 
 ## Next steps
 
-[Learn more about passwordless](concept-authentication-passwordless.md)
+[Learn more about passwordless](concept-authentication-passwordless.md)