Linux sec limits, removed AD restiction

Author: BYHAM

docs/linux/sql-server-linux-security-overview.md

@@ -6,7 +6,7 @@ description: This topic describes SQL Server on Linux restrictions.
 author: BYHAM 
 ms.author: rickbyh 
 manager: jhubbard
-ms.date: 03/17/2017
+ms.date: 07/17/2017
 ms.topic: article
 ms.prod: sql-linux
 ms.technology: database-engine
@@ -28,7 +28,6 @@ ms.assetid: 64da74cc-14bf-4636-a55e-8cc1fce2aaff
 
 SQL Server on Linux currently has the following limitations: 
 
-* Only SQL Server authentication is currently available.
 * A standard password policy is provided. MUST_CHANGE is the only option you may configure.  
 * Extensible Key Management is not supported. 
 * Using keys stored in the Azure Key Vault is not supported.