Impersonation, Active Directory, and “user does not have authority to xxxx” issues

I have 2 ASP.NET MVC 3 applications. I am using impersonation via the web.config to allow me to query Active Directory to get details on the user. The application uses Windows authentication and does not allow anonymous users. One application is the primary application where the user performs their tasks. The other allows the user to set up other user's to look like them in application one.I have 2 ASP.NET MVC 3 applications. I am using