I want to setup security of my site by using "windows Authentication" + Acls +impersonate
The users will authenticate to site with account that is not allowed to access to files and then impersonate
To account that has permission to access files.
I have problem with impersonate because After impersonate The prompt would appear to enter username & password.
I don't know why?
I check "Context.User.Identity.Name" and it changes to impersonate user, but "Context.Request.LogonUserIdentity.Name" is account that
user authenticate at first to arrive to site.
I appreciate if anybody could help me to find reason of this problem

Best Regards