Expanding acronym

Author: dknappettmsft

articles/virtual-desktop/configure-single-sign-on.md

@@ -17,7 +17,7 @@ ms.author: helohr
 > This preview version is provided without a service level agreement, and is not recommended for production workloads. Certain features might not be supported or might have constrained capabilities.
 > For more information, see [Supplemental Terms of Use for Microsoft Azure Previews](https://azure.microsoft.com/support/legal/preview-supplemental-terms/).
 
-This article will walk you through the process of configuring single sign-on (SSO) using Azure AD authentication for Azure Virtual Desktop (preview). When you enable SSO, you can use passwordless authentication and third-party Identity Providers that federate with Azure AD to sign in to your resources.
+This article will walk you through the process of configuring single sign-on (SSO) using Azure Active Directory (Azure AD) authentication for Azure Virtual Desktop (preview). When you enable SSO, you can use passwordless authentication and third-party Identity Providers that federate with Azure AD to sign in to your resources.
 
 > [!NOTE]
 > Azure Virtual Desktop (classic) doesn't support this feature.