I am running SBS 2003 with 15 computers 2k pro/XP pro. I keep getting this error type for some of the users on a daily basis(just upgraded from NT). I followed the link it provided on the bottom which takes me to Microsoft and it explains the event. Problem, its explanation of a resolution is for nt workstation or server. The symptoms state "a domain controller for your domain could not be located and you have been logged on using a cached information". Any suggestions on how in the resolution section I can do this for 2k/xp computers?