如何为部署到aws弹性beanstalk的ASP.NET应用程序设置应用程序池标识

How can you tell AWS-EB the desired AppPool identity for an ASP.NET web app running in IIS? In the AWS Beanstalk Deploy wizard I don't see this option like you would if deploying straight to IIS or when changing it manually in IIS. Obviously once deployed you can change it in the EC2 instance, but that doesn't help the "xcopy deploy" story of using EB.How can you tell AWS-EB the desired AppPool ide