AddSecondaryNodetoADFSFarm.json

{
      "type": "Microsoft.Compute/virtualMachines/extensions",
      "name": "[concat(parameters('ADFS02VMName'),'/InstallADFS')]",
      "apiVersion": "2015-05-01-preview",
      "location": "[resourceGroup().location]",
      "dependsOn": [
        "[concat('Microsoft.Compute/virtualMachines/', parameters('ADFS02VMName'))]",
       ],
      "properties": {
        "publisher": "Microsoft.Powershell",
        "type": "DSC",
        "typeHandlerVersion": "2.19",
        "autoUpgradeMinorVersion": true,
        "settings": {
          "ModulesUrl": "[variables('InstallADFSPackageURL')]",
          "ConfigurationFunction": "[variables('InstallADFSConfigurationFunction')]",
          "Properties": {
            "MachineName": "[parameters('ADFS02VMName')]",
            "DomainName": "[parameters('domainName')]",
            "AdminCreds": {
              "UserName": "[parameters('adminUserName')]",
              "Password": "PrivateSettingsRef:AdminPassword"
            }
          }
        },
        "protectedSettings": {
          "Items": {
            "AdminPassword": "[parameters('adminPassword')]"
          }
        }
      }
    },
    {
      "type": "Microsoft.Compute/virtualMachines/extensions",
      "name": "[concat(parameters('ADFS02VMName'),'/AddToADFSFarm')]",
      "apiVersion": "2015-05-01-preview",
      "location": "[resourceGroup().location]",
      "dependsOn": [
        "[concat('Microsoft.Compute/virtualMachines/', parameters('ADFS02VMName'),'/extensions/InstallADFS')]"
      ],
      "properties": {
        "publisher": "Microsoft.Compute",
        "type": "CustomScriptExtension",
        "typeHandlerVersion": "1.4",
        "autoUpgradeMinorVersion": true,
        "settings": {
          "fileUris": [
            "[variables('AddToADFSFarmScriptUrl')]"
          ],
          "commandToExecute": "[concat('powershell.exe -file AddToADFSFarm.ps1',' -DomainName ',parameters('domainName'),' -PrimaryADFSServer ',parameters('ADFS01VMName'),' -AdfsSvcUsername ',parameters('AdfsSvcUsername'))]"
        }
      }
    },