AzureStack-QuickStart-Templates/ScaleInOutExistingVmss-managed/azuredeploy.parameters.json

{
  "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "existingVmssName": {
      "value": "MyExistingVmss"
    },
    "newCapacity": {
      "value": 3
    }
  }
}