Added additional notes to methods available

Added additional notes and clarity surrounding auth method registrations.

Author: tilarso

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

@@ -64,9 +64,10 @@ Combined registration supports the authentication methods and actions in the fol
 | FIDO2 security keys*| Yes | No | Yes |
 
 > [!NOTE]
+> <b>Alternate phone</b> can only be registered in *manage mode* on the [Security info](https://mysignins.microsoft.com/security-info) page and requires Voice calls to be enabled in the Authentication methods policy. <br /> 
 > <b>Office phone</b> can only be registered in *Interrupt mode* if the users *Business phone* property has been set. Office phone can be added by users in *Managed mode from the [Security info](https://mysignins.microsoft.com/security-info)* without this requirement.  <br />
-> <b>App passwords</b> are available only to users who have been enforced for Azure AD Multi-Factor Authentication. App passwords are not available to users who are enabled for Azure AD Multi-Factor Authentication by a Conditional Access policy. <br />
-> <b>FIDO2 security keys</b>, can only be added in *Managed mode only from the [Security info](https://mysignins.microsoft.com/security-info) page*
+> <b>App passwords</b> are available only to users who have been enforced for per-user MFA. App passwords are not available to users who are enabled for Azure AD Multi-Factor Authentication by a Conditional Access policy. <br />
+> <b>FIDO2 security keys</b>, can only be added in *manage mode only* on the [Security info](https://mysignins.microsoft.com/security-info) page.
 
 Users can set one of the following options as the default multifactor authentication method.