One of my clients experienced this problem when logging on to their 2003 SBS network. Seems a prior tech company had rebuilt their SBS network and they were now experiencing this very annoying issue. A quick switch to force kerberos to use TCP instead of the default UDP and all was well. Wish all problems could be fixed this easily. Details for the fix here: http://support.microsoft.com/kb/244474
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Brian Alaway Consulting – Overdelivering Technology For Your Business
