fixed acro

Author: Justinha

articles/active-directory/authentication/howto-mfa-mfasettings.md

@@ -206,7 +206,7 @@ The following table lists more numbers for different countries.
 | Vietnam              | +84 2039990161  |
 
 > [!NOTE]
-> When Azure AD Multi-Factor Authentication calls are placed through the public telephone network, sometimes the calls are routed through a carrier that doesn't support caller ID. Because of this, caller ID isn't guaranteed, even though Azure AD Multi-Factor Authentication always sends it. This applies both to phone calls and text messages provided by Azure AD Multi-Factor Authentication. If you need to validate that a text message is from Azure AD Multi-Factor Authentication, see [What SMS short codes are used for sending messages?](multi-factor-authentication-faq.yml#what-sms-short-codes-are-used-for-sending-sms-messages-to-my-users-).
+> When Azure AD Multi-Factor Authentication calls are placed through the public telephone network, sometimes the calls are routed through a carrier that doesn't support caller ID. Because of this, caller ID isn't guaranteed, even though Azure AD Multi-Factor Authentication always sends it. This applies both to phone calls and text messages provided by Azure AD Multi-Factor Authentication. If you need to validate that a text message is from Azure AD Multi-Factor Authentication, see [What short codes are used for sending messages?](multi-factor-authentication-faq.yml#what-short-codes-are-used-for-sending-text-messages-to-my-users-).
 
 To configure your own caller ID number, complete the following steps:
 
@@ -215,7 +215,7 @@ To configure your own caller ID number, complete the following steps:
 1. Select **Save**.
 
 > [!NOTE]
-> When Azure AD Multi-Factor Authentication calls are placed through the public telephone network, sometimes the calls are routed through a carrier that doesn't support caller ID. Because of this, caller ID isn't guaranteed, even though Azure AD Multi-Factor Authentication always sends it. This applies both to phone calls and text messages provided by Azure AD Multi-Factor Authentication. If you need to validate that a text message is from Azure AD Multi-Factor Authentication, see [What SMS short codes are used for sending messages?](multi-factor-authentication-faq.yml#what-sms-short-codes-are-used-for-sending-sms-messages-to-my-users-).
+> When Azure AD Multi-Factor Authentication calls are placed through the public telephone network, sometimes the calls are routed through a carrier that doesn't support caller ID. Because of this, caller ID isn't guaranteed, even though Azure AD Multi-Factor Authentication always sends it. This applies both to phone calls and text messages provided by Azure AD Multi-Factor Authentication. If you need to validate that a text message is from Azure AD Multi-Factor Authentication, see [What short codes are used for sending messages?](multi-factor-authentication-faq.yml#what-short-codes-are-used-for-sending-text-messages-to-my-users-).
 
 ### Custom voice messages