enablevmbackup.json

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "existingVirtualMachinesResourceGroup": {
      "type": "string",
      "metadata": {
        "description": "Resource group where the virtual machines are located. This can be different than resource group of the vault. "
      }
    },
    "existingVirtualMachines": {
      "type": "array",
      "metadata": {
        "description": "Array of Azure virtual machines. e.g. [\"vm1\",\"vm2\",\"vm3\"]"
      }
    },
    "existingRecoveryServicesVault": {
      "type": "string",
      "metadata": {
        "description": "Recovery services vault name where the VMs will be backed up to. "
      }
    },
    "existingBackupPolicy": {
      "type": "string",
      "defaultValue": "DefaultPolicy",
      "metadata": {
        "description": "Backup policy to be used to backup VMs. Backup POlicy defines the schedule of the backup and how long to retain backup copies. By default every vault comes with a 'DefaultPolicy' which canbe used here."
      }
    },
    "location": {
      "type": "string",
      "defaultValue": "[resourceGroup().location]",
      "metadata": {
        "description": "Location for all resources."
      }
    }
  },
  "variables": {
    "backupFabric": "Azure",
    "v2VmType": "Microsoft.Compute/virtualMachines",
    "v2VmContainer": "iaasvmcontainer;iaasvmcontainerv2;",
    "v2Vm": "vm;iaasvmcontainerv2;"
  },
  "resources": [
    {
      "name": "[concat(parameters('existingRecoveryServicesVault'), '/', variables('backupFabric'), '/', variables('v2VmContainer'), concat(parameters('existingVirtualMachinesResourceGroup'),';',parameters('existingVirtualMachines')[copyIndex()]), '/', variables('v2Vm'), concat(parameters('existingVirtualMachinesResourceGroup'),';',parameters('existingVirtualMachines')[copyIndex()]))]",
      "apiVersion": "2016-06-01",
      "location": "[parameters('location')]",
      "type": "Microsoft.RecoveryServices/vaults/backupFabrics/protectionContainers/protectedItems",
      "copy": {
        "name": "v2VmsCopy",
        "count": "[length(parameters('existingVirtualMachines'))]"
      },
      "properties": {
        "protectedItemType": "[variables('v2VmType')]",
        "policyId": "[resourceId('Microsoft.RecoveryServices/vaults/backupPolicies',parameters('existingRecoveryServicesVault'),parameters('existingBackupPolicy') )]",
        "sourceResourceId": "[resourceId(subscription().subscriptionId,parameters('existingVirtualMachinesResourceGroup'),'Microsoft.Compute/virtualMachines',parameters('existingVirtualMachines')[copyIndex()])]"
      }
    }
  ]
}