Update UI change

When Enabled combined registration is active, right now option is no more available. There might be cases where CX can see it but it's also greyed out.

Author: miguel-s-ferreira

articles/active-directory/authentication/howto-registration-mfa-sspr-combined.md

@@ -36,6 +36,9 @@ To enable combined registration, complete these steps:
 
    ![Enable the combined security info experience for users](media/howto-registration-mfa-sspr-combined/enable-the-combined-security-info.png)
 
+> [!IMPORTANT]
+> If your Azure tenant has already been enabled for combined registration, you might not see again the configuration option for **Users can use the combined security information registration experience** or even see it greyed out.
+
 > [!NOTE]
 > After you enable combined registration, users who register or confirm their phone number or mobile app through the new experience can use them for Azure AD Multi-Factor Authentication and SSPR, if those methods are enabled in the Azure AD Multi-Factor Authentication and SSPR policies.
 >