Constrained Delegation with Kerberos and SSAS Named Instance

If you building an environment with Kerberos Constrained Delegation, and have a named instance of Analysis Services, where your DC is running Windows Server 2003, take note.  Having learned the hard way this week, there is a hot fix for Windows Server 2003 you'll need to apply before Kerberos will work with the named instance of SSAS.

Here's the link to the hotfix KB article: