az feedback auto-generates most of the information requested below, as of CLI version 2.0.62

Related command
"az appservice plan create --name "WindowsASEContainer" --resource-group sapalan --app-service-environment spASEVEILB --hyper-v --sku I2"

Describe the bug
Attempting to create Windows Container App Service Plan under "ASE" v3.
However the command fails with error "Windows containers is not yet supported in app service environment"

From the source code, i could see that if app service environment flag is set with hyper-v switch it is directly throwing the error.

"client = web_client_factory(cmd.cli_ctx)
if app_service_environment:
if hyper_v:
raise ArgumentUsageError('Windows containers is not yet supported in app service environment')"

To Reproduce

1. Try creating a Windows Container Plan with -app-service-environment switch
   Eg: "az appservice plan create --name <> --resource-group <> --app-service-environment spASEVEILB --hyper-v --sku I2"

Expected behavior
It should create an Windows Container plan in the ASE. As per this article, ASEV3 supports Windows Container
https://azure.microsoft.com/en-us/updates/azure-app-service-environment-v3-support-for-windows-containers-is-now-generally-available/

Environment summary

• Tried from Shell in the portal which uses az version 2.36.0 as well from the command prompt which was using 2.26.0