update to xoauth2

Author: ddouglas-msft

articles/communication-services/quickstarts/email/send-email-smtp/send-email-smtp-oauth.md

@@ -10,9 +10,9 @@ ms.topic: quickstart
 ms.service: azure-communication-services
 ms.custom: devx-track-dotnet
 ---
-# Quickstart: Send email with SMTP using .NET
+# Quickstart: Send email with SMTP and XOAuth2 using .NET
 
-This articles hows how to use OAuth for authentication when sending emails using the Simple Mail Transfer Protocal (SMTP) and Azure Communication Services.
+This articles hows how to use XOAuth2 for authentication when sending emails using the Simple Mail Transfer Protocal (SMTP) and Azure Communication Services.
 
 ## Prerequisites
 

articles/communication-services/toc.yml

@@ -204,7 +204,7 @@ items:
         href: quickstarts/email/send-email-smtp/smtp-authentication.md
       - name: Send email using SMTP
         href: quickstarts/email/send-email-smtp/send-email-smtp.md
-      - name: Send email using SMTP with OAuth
+      - name: Send email using SMTP with XOAuth2
         href: quickstarts/email/send-email-smtp/send-email-smtp-oauth.md
     - name: Attachments
       items: