Update share-images-across-tenants.md

Author: mimckitt

articles/virtual-machine-scale-sets/share-images-across-tenants.md

@@ -2,12 +2,14 @@
 title: Share gallery images across tenants in Azure
 description: Learn how to share VM images across Azure tenants using Shared Image Galleries.
 author: cynthn
+ms.author: cynthn
+ms.topic: how-to
 ms.service: virtual-machine-scale-sets
-ms.workload: infrastructure-services
-ms.tgt_pltfrm: vm-windows
-ms.topic: conceptual
+ms.subservice: imaging
 ms.date: 04/05/2019
-ms.author: cynthn
+ms.reviewer: akjosh
+ms.custom: akjosh
+
 ---
 # Share gallery VM images across Azure tenants