2079112: Increase core and memory of Exchange VM to be performant (#329)

exchange-2016-non-ha/azuredeploy.json

@@ -31,7 +31,7 @@
         "vmName": "[concat('vm', resourceGroup().name)]",
         "vmOsDiskName": "[concat('od', resourceGroup().name)]",
         "vmDataDiskName": "[concat('dd', resourceGroup().name)]",
-        "vmSize": "Standard_D2",
+        "vmSize": "Standard_D3",
         "vmDataDiskSize": "15",
         "vmNicName": "[tolower(concat('nc', resourceGroup().name))]",
         "virtualNetworkName": "[tolower(concat('vn', resourceGroup().name))]",