When you create a cache rule in Microsoft Internet Security and Acceleration (ISA) Server 2004, the Background Intelligent Transfer Service (BITS) option is incorrectly available for any non-Microsoft Update cache rule that you create. To resolve this problem, obtain the update for HTTP issues in Internet Security and Acceleration Server 2004 with Service Pack 2 (SP2).
For more information, check out http://support.microsoft.com/default.aspx?scid=kb;en-us;917134&sd=rss&spid=2108
HTH,
Tom
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP — ISA Firewalls