Are they cloned machines? Try running Newsid from sysinternals on the affected machines. Martin T. Hugo Network Administrator Hilliard City Schools Tel: 614-921-7102 Martin_Hugo@xxxxxxxx gptalk@xxxxxxxxxxxxx writes: >Hi all, > >I was just wondering if anyone had come across this issue before. I was >having some problems with GPO processing - software installation and >noticed that several workstations were members of a Group called NULL >SID instead of expected groups (authenticated users etc) > >I seem to get various GPO processing problems with these (obviously >because they are not in authenticated users group and can't read the >policies) Re-adding the machine to domain solves initially but then it >will end up joining the Null SID group again. DCs seem fine and >machines can connect to Domain and authenticate etc - ran dcdiag, nltest >etc. > >Any thoughts or clues would be be most welcome. At the moment my only >fix is removing and readding to domain which fixes temporarily. > >Thanks for your thoughts - I am guessing it must be some sort of >intermittent network problem. Found a little on web on this issue but >no real fix or cause so far. > >Thanks >Neil >*********************** >You can unsubscribe from gptalk by sending email to >gptalk-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field OR >by logging into the freelists.org Web interface. Archives for the list >are available at http://www.freelists.org/archives/gptalk/ >************************