
1 - Create a public load balancer in the Standard SKU
2 - Create a backend pool that contains VMScaleSet1
3 - Create an outbound rule
Reference:
https://docs.microsoft.com/en-us/azure/load-balancer/skus
https://docs.microsoft.com/en-us/azure/load-balancer/load-balancer-outbound-connections#outboundrules