Classic WVD autoscale modification

Dante Nahuel Ciai, no problems there at all 

It sounds like you need a virtual machine scale set (an overview https://docs.microsoft.com/en-us/azure/virtual-machine-scale-sets/overview). The trick is, just like the App Services, you can scale-out and scale-in the VMs in the scale sets basing on the scalability rules/metrics. For that, you need to create a scale set and enable autoscale for it. Then, using some Azure CLI + Templates you can https://docs.microsoft.com/en-us/azure/virtual-machine-scale-sets/tutorial-autoscale-template. And finally, creating the rule following the guidelines, do not forget to create the same for scaling the set back in (it doesn't happen automatically).