Moodle on IIS7.5 SSO fails
I've got LDAP authentication working. Now I'm stuck on NTLM SSO. I've worked through NTLM authentication - MoodleDocs.
Now SSO fails every time.
With IE fast path disabled, users see:-
Attempting Single Sign On via NTLM...
Auto-login failed, try the normal login page...
then Moodle goes to the normal login screen, and they can log in with their LDAP credentials
With IE fat path enabled, it's worse. User just see a blank white screen with:-
Fatal error: $CFG->dataroot is not writable, admin has to fix directory permissions! Exiting.
Then it's impossible to log on.