NTLM authentication to AD FS for non-IE browser without 'Extended Protection' switched off?
When using NTLM authentication to AD FS 2.0, from Google Chrome or Firefox 3.5+ running on Windows, then this results in a repeated sign-in dialog and finally sign-in failure, with 'Audit Failure' events with "Status: 0xc000035b". This can be 'solved' by switching off 'Extended Protection' for the "/adfs/ls" web application in IIS. This is documented in several places; see my answer to another StackOverflow question for details. My question is: How can one make NTLM authentication to AD FS work for these browsers without switching off 'Extended Protection'? I mean, in Internet Explorer this