Can custom auto scaling(rules based) of the app service plan exclude a webapp?

Question

Hi Team,

https://docs.azure.cn/en-us/app-service/manage-scale-per-app

According to this document, app service plans can use per-app scaling. Is it compatible with custom auto scaling(rules based)? That is, custom auto scaling excludes one application and lets that application use a fixed number of instances, while other applications customize autoscaling.

I tested it. It doesn't seem to be working. Here I want to confirm whether it is the design or the bug?