{
    "properties": {
      "displayName": "Virtual machines and virtual machine scale sets should have encryption at host enabled",
      "policyType": "BuiltIn",
      "mode": "Indexed",
      "description": "Use encryption at host to get end-to-end encryption for your virtual machine and virtual machine scale set data. Encryption at host enables encryption at rest for your temporary disk and OS/data disk caches. Temporary and ephemeral OS disks are encrypted with platform-managed keys when encryption at host is enabled. OS/data disk caches are encrypted at rest with either customer-managed or platform-managed key, depending on the encryption type selected on the disk. Learn more at https://aka.ms/vm-hbe.",
      "metadata": {
        "category": "Compute",
        "version": "1.0.0"
      },
      "parameters": {
        "effect": {
          "type": "string",
          "defaultValue": "Audit",
          "allowedValues": [
            "Audit",
            "Deny",
            "Disabled"
          ],
          "metadata": {
            "displayName": "Effect",
            "description": "Enable or disable the execution of the policy"
          }
        }
      },
      "policyRule": {
        "if": {
          "anyOf": [
            {
              "allOf": [
                {
                  "field": "type",
                  "equals": "Microsoft.Compute/virtualMachines"
                },
                {
                  "field": "Microsoft.Compute/virtualMachines/securityProfile.encryptionAtHost",
                  "notEquals": "true"
                }
              ]
            },
            {
              "allOf": [
                {
                  "field": "type",
                  "equals": "Microsoft.Compute/virtualMachineScaleSets"
                },
                {
                  "field": "Microsoft.Compute/virtualMachineScaleSets/virtualMachineProfile.securityProfile.encryptionAtHost",
                  "notEquals": "true"
                }
              ]
            }
          ]
        },
        "then": {
          "effect": "[parameters('effect')]"
        }
      }
    },
    "id": "/providers/Microsoft.Authorization/policyDefinitions/fc4d8e41-e223-45ea-9bf5-eada37891d87",
    "name": "fc4d8e41-e223-45ea-9bf5-eada37891d87"
  }