tweak to clarify nat64

Author: christiankuhtz

articles/load-balancer/load-balancer-ipv6-overview.md

@@ -14,7 +14,7 @@ ms.devlang: na
 ms.topic: article
 ms.tgt_pltfrm: na
 ms.workload: infrastructure-services
-ms.date: 09/25/2017
+ms.date: 08/24/2018
 ms.author: kumud
 ---
 
@@ -75,6 +75,7 @@ Limitations
 * Changing the IdleTimeout parameter for IPv6 is **currently not supported**. The default is four minutes.
 * Changing the loadDistributionMethod parameter for IPv6 is **currently not supported**.
 * Reserved IPv6 IPs (where IPAllocationMethod = static) are **currently not supported**.
+* NAT64 (translation of IPv6 to IPv4) is not supported.
 
 ## Next steps