Deny-Storage-CopyScope.json

{
    "name": "Deny-Storage-CopyScope",
    "type": "Microsoft.Authorization/policyDefinitions",
    "apiVersion": "2021-06-01",
    "scope": null,
    "properties": {
        "policyType": "Custom",
        "mode": "All",
        "displayName": "Allowed Copy scope should be restricted for Storage Accounts",
        "description": "Azure Storage accounts should restrict the allowed copy scope. Enforce this for increased data exfiltration protection.",
        "metadata": {
            "version": "1.0.0",
            "category": "Storage",
            "source": "https://github.com/Azure/Enterprise-Scale/",
            "alzCloudEnvironments": [
                "AzureCloud",
                "AzureChinaCloud",
                "AzureUSGovernment"
            ]
        },
        "parameters": {
            "effect": {
                "type": "String",
                "allowedValues": [
                    "Audit",
                    "Deny",
                    "Disabled"
                ],
                "defaultValue": "Deny",
                "metadata": {
                    "displayName": "Effect",
                    "description": "Enable or disable the execution of the policy"
                }
            },
            "allowedCopyScope": {
                "type": "String",
                "metadata": {
                    "displayName": "Allowed Copy Scope",
                    "description": "Specify the allowed copy scope."
                },
                "allowedValues": [
                    "AAD",
                    "PrivateLink"
                ],
                "defaultValue": "AAD"
            }
        },
        "policyRule": {
            "if": {
                "allOf": [
                    {
                        "field": "type",
                        "equals": "Microsoft.Storage/storageAccounts"
                    },
                    {
                        "anyOf": [
                            {
                                "field": "Microsoft.Storage/storageAccounts/allowedCopyScope",
                                "exists": "false"
                            },
                            {
                                "field": "Microsoft.Storage/storageAccounts/allowedCopyScope",
                                "notEquals": "[[parameters('allowedCopyScope')]"
                            }
                        ]
                    }
                ]
            },
            "then": {
                "effect": "[[parameters('effect')]"
            }
        }
    }
}