http://blogs.technet.com/authentication/archive/2006/04/27/migrating-from-ntlm-to-negotiate-in-a-nutshell.aspxMigrating to Negotiate from NTLM is quite simple in most cases. It breaks down into these four simple steps: First, build an SPN for your Service When I talk to people about using Negotiate, there’s often this moment of terror when they realize they’reen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/authentication/archive/2006/04/27/migrating-from-ntlm-to-negotiate-in-a-nutshell.aspx#1440265Wed, 04 Jul 2007 21:15:56 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:1440265tlachev<p>It is becoming increasingly common to implement a solution spanning several servers that uses Windows authentication, e.g. Intranet web application on a web server and Analysis Services on a dedicated server. Currently, the only way to pass the user identity across machines is to go through 100 hoops to set up Kerberos because NTLM doesn't support delegation. </p> <p>Will Longhorn make cross-machine delegation any easier?</p>