Merge pull request #106306 from roygara/rephrase

Rephrase

Author: PRMerger14

articles/storage/files/storage-files-identity-auth-active-directory-enable.md

@@ -4,7 +4,7 @@ description: Learn how to enable identity-based authentication over SMB for Azur
 author: roygara
 ms.service: storage
 ms.topic: conceptual
-ms.date: 02/23/2020
+ms.date: 03/03/2020
 ms.author: rogarana
 ---
 
@@ -57,13 +57,13 @@ Before you enable AD authentication for Azure file shares, make sure you have co
 
 ## Regional availability
 
-Azure Files AD authentication (preview) is available in [most public regions](https://azure.microsoft.com/global-infrastructure/regions/) except for:
+Azure Files AD authentication (preview) is available in [most public regions](https://azure.microsoft.com/global-infrastructure/regions/).
 
+Azure Files AD authentication is not available in:
 - West US
 - West US 2
 - East US
 - East US 2
-- South Central US
 - West Europe
 - North Europe