Update how-to-mfa-registration-campaign.md

Author: Justinha

articles/active-directory/authentication/how-to-mfa-registration-campaign.md

@@ -6,7 +6,7 @@ services: active-directory
 ms.service: active-directory
 ms.subservice: authentication
 ms.topic: conceptual
-ms.date: 12/15/2021
+ms.date: 02/11/2022
 
 ms.author: justinha
 author: mjsantani
@@ -24,11 +24,11 @@ In addition to choosing who can be nudged, you can define how many days a user c
 
 ## Prerequisites 
 
-- Your organization must have enabled Azure MFA. 
+- Your organization must have enabled Azure MFA. Every edition of Azure AD includes Azure MFA. No additional license is needed for a registration campaign.
 - User must not have already set up Microsoft Authenticator for push notifications on their account. 
 - Admins need to enable users for Microsoft Authenticator using one of these policies:  
   - MFA Registration Policy: Users will need to be enabled for **Notification through mobile app**.  
-  - Authentication Methods Policy: Users will need to be enabled for the Microsoft Authenticator and the Authentication mode set to **Any** or **Push**. If the policy is set to **Passwordless**, the user will not be eligible for the nudge. 
+  - Authentication Methods Policy: Users will need to be enabled for the Microsoft Authenticator and the Authentication mode set to **Any** or **Push**. If the policy is set to **Passwordless**, the user will not be eligible for the nudge. For more information about how to set the Authentication mode, see [Enable passwordless sign-in with the Microsoft Authenticator app](howto-authentication-passwordless-phone.md). 
 
 ## User experience