I am about to start migrating sites from one Windows 2008R2 to another and hit an issue. I have a new site and new Application Pool configured both identical (imported) from the old server. The Application pool is configured to use Application Pool Identity and have given the relevant area NTFS permissions for this user (IIS AppPool\name) user but I am getting access denied. When I use Procmon I see that the site is trying to use IUSR instead. I have checked and rechecked the obvious, created a brand new site etc and still get the same error. I could give IUSR permission, but would prefer all sites to run under their own user accounts.