I first created the App Service Plan and App service and later created the App Services Environment. Now I want to change the App Service Plan to use the newly configured ASE, but not able to change it. I created another App Service Plan to use the ASE, but then it was not visible under the Change App Service Plean within App Services.
I created another App Service Plan to use the ASE, but then it was not visible under the Change App Service Plean within App Services.
If apps have already been deployed into existing App Service Plan. Unfortunately there is no straight way option to move to an ASE.
All you can do is to clone it into a new ASP which has been deployed into your ASE or redeploy the app in ASE.
Follow this for more information : Cloning an existing App to an App Service Environment