removed preview stuff

Author: asudbring

articles/virtual-network/nat-gateway-resource.md

@@ -17,7 +17,7 @@ ms.date: 03/04/2020
 ms.author: allensu
 ---
 
-# Designing virtual networks with NAT gateway resources (Public Preview)
+# Designing virtual networks with NAT gateway resources
 
 NAT gateway resources are part of [Virtual Network NAT](nat-overview.md) and provide outbound Internet connectivity for one or more subnets of a virtual network. The subnet of the virtual network states which NAT gateway will be used. NAT provides source network address translation (SNAT) for a subnet.  NAT gateway resources specify which static IP addresses virtual machines use when creating outbound flows. Static IP addresses come from public IP address resources, public IP prefix resources, or both. A NAT gateway resource can use up to 16 static IP addresses from either.