Merge pull request #86592 from barclayn/availability-zones

adding availability zones

Author: PRMerger16

articles/security/fundamentals/iaas.md

@@ -14,7 +14,7 @@ ms.devlang: na
 ms.topic: article
 ms.tgt_pltfrm: na
 ms.workload: na
-ms.date: 05/05/2019
+ms.date: 08/26/2019
 ms.author: barclayn
 ---
 
@@ -66,7 +66,7 @@ Your subscription admins and coadmins can change this setting, making them admin
 Organizations that control VM access and setup improve their overall VM security.
 
 ## Use multiple VMs for better availability
-If your VM runs critical applications that need to have high availability, we strongly recommend that you use multiple VMs. For better availability, use an [availability set](../../virtual-machines/windows/manage-availability.md#configure-multiple-virtual-machines-in-an-availability-set-for-redundancy).
+If your VM runs critical applications that need to have high availability, we strongly recommend that you use multiple VMs. For better availability, use an [availability set](../../virtual-machines/windows/manage-availability.md#configure-multiple-virtual-machines-in-an-availability-set-for-redundancy) or availability [zones](../../availability-zones/az-overview.md).
 
 An availability set is a logical grouping that you can use in Azure to ensure that the VM resources you place within it are isolated from each other when they’re deployed in an Azure datacenter. Azure ensures that the VMs you place in an availability set run across multiple physical servers, compute racks, storage units, and network switches. If a hardware or Azure software failure occurs, only a subset of your VMs are affected, and your overall application continues to be available to your customers. Availability sets are an essential capability when you want to build reliable cloud solutions.