By default, each virtual application node appears under a separate tier named <webapp-name>/<pathname-of-sub-app>in the Controller UI. For example, if an Azure Web App named demomultiapp has three virtual apps (the main application and two sub applications named billing and reports), the sub application tiers are named demomultiapp, demomultiapp/billing, and demomultiapp/reports. The node name is the tier name prepended with the name of the virtual machine on which it runs. For example, demomultiapp/billing may have a node named RD001550D5449FA-demomultiapp/billing.

You can manually edit the tier name in the Controller UI.