{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "apiProfile": "2018-03-01-hybrid",
  "parameters": {
    "vmName": {
        "type": "string",
        "metadata": {
            "description": "Name of the existing VM to apply the custom script to"
        },
        "defaultvalue": "[substring(concat('simplewinvm',resourceGroup().Name),0,12)]"
    }
  },
  "variables": {
  },
  "resources": [
    {
      "type": "Microsoft.Compute/virtualMachines/extensions",
      "name": "[concat(parameters('vmName'),'/CustomScriptExtension')]",
      "location": "[resourceGroup().location]",
      "properties": {
        "publisher": "Microsoft.Compute",
        "type": "CustomScriptExtension",
        "typeHandlerVersion": "1.8",
        "autoUpgradeMinorVersion": "true",
        "settings": {
            "commandToExecute": "powershell -ExecutionPolicy Unrestricted Set-DnsClientServerAddress -InterfaceAlias (Get-NetAdapter).Name -ServerAddresses 192.168.100.2, 8.8.8.8"
        }
      }
    }
  ],
  "outputs": {}
}