http://blogs.technet.com/tristank/archive/2007/12/21/kerberos-and-setspn-improvements-in-iis-7-0-under-windows-server-2008.aspxAll this stuff is based on a prerelease (RC1) version of Windows Server 2008 and may change before final release. Cheques may not be honoured. I had a happy moment one night in India when the trainer for our IIS 7.0 TTT course discussed some of the Kerberos-relateden-AUCommunityServer 2.1 SP1 (Build: 61025.2)