Hi,
The system.webServer/modules section is defined as allowDefinition="MachineToApplication" by default. We can have this section in Machine.config ,ApplicationHost.config, Root application Web.config or Application Web.config.
You can either convert the virtual directory to an application(Right-Click the virtual directory ->Convert to Application) or modify the web.config file.
richiebabes99:The server is configured to use pass-through authentication with a built-in account to access the specified physical path. However, IIS Manager cannot verify whether the built-in account has access. Make sure that the application pool identity has Read access to the physical path. If this server is joined to a domain, and the application pool identity is NetworkService or LocalSystem, verify that <domain>\<computer_name>$ has Read access to the physical path. Then test these settings again.
IIS can only verify those built-in accounts access during runtime. Hence, you got the warning above. You can safely ignore this warning.