http://support.microsoft.com/default.aspx?scid=kb;en-us;810572
Requirements for Delegation
Delegation relies on Integrated Windows authentication to access resources. There is no limit on the number of computers that you
can delegate your account -- you must correctly configure each of them. The Integrated Windows authentication method works only if
the following two conditions exist:
You set up your network to use the Kerberos authentication protocol that requires Active Directory.
You set up the computers and accounts on your network as trusted for delegation.
If these conditions are not true, you cannot use Integrated Windows authentication to access data on a remote resource because
Integrated Windows authentication only gives you access to the IIS server and not to the additional resources configured for Windows
authentication that the IIS server remotely accesses.



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