Thread:Project:Support desk/Localsettings.php not Found by non-admin users/reply (6)

Found the answer to our particular issue - Turns out we needed to change the IIS 7.5 application pool to use a domain account as the identified login account instead of depending on the default "ApplicationPoolIdentity" identity that IIS assigns to the site when it is created. The trick is to change this and then to get the end users to close their browsers and retry access and this should get them in with a working setup.