*node json*
{
    "name": "devWeb1.seattle.internal.local",
    "chef_environment": "dev",
    "normal": {
        "fqdn": "devWeb1.seattle.internal.local",
        "platform": "windows",
        "tags": [

        ]
    },
    "override_attributes": {
        "pos_iis": {
            "certificate_subject": "CN=devWeb1.seattle.internal.local"
        }
    },
    "run_list": [
        "recipe[pos_iis]",
        "recipe[carbon_calculator]"
    ]
}


*cookbook attribute*
default['pos_iis']['certificate_subject'] = 'CN=invalid.seattle.internal.local'