apple_device-management/examples/declarative/status/account.list.carddav/example1.json

{
    "account": {
        "list": {
            "carddav": [
                {
                    "identifier": "D9BE9076-GD99-5C55-BF28-234567890123",
                    "declaration-identifier": "com.example.carddav-account",
                    "visible-name": "Work Contacts",
                    "hostname": "carddav.example.com",
                    "port": 443,
                    "username": "user@example.com"
                }
            ]
        }
    }
}