Public/Deploy/Security/managed-services/_templates/azuredeploy.parameters.json

{
    "$schema": "https://schema.management.azure.com/schemas/2018-05-01/subscriptionDeploymentParameters.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "customerGroupId": {
            "value": "<GUID of CUSTOMER SPECIFIC GROUP>"
        }
    }
}