Give evidence to users group not used

Due to being referenced on community forums several times (usage of user group for IDP mail notifications), it should highlighted for future reference

Author: miguel-s-ferreira

articles/active-directory/identity-protection/howto-identity-protection-configure-notifications.md

@@ -24,7 +24,8 @@ Azure AD Identity Protection sends two types of automated notification emails to
 
 This article provides you with an overview of both notification emails.
 
-We don't support sending emails to users in group-assigned roles.
+   > [!Note]
+   > **We don't support sending emails to users in group-assigned roles.**
 
 ## Users at risk detected email