hey guys, need some major help here, we have a 10 server farm, each running windows 2000 server. We have 1 pdc that went down and we still have a fully functional bdc. the pdc went down a couple weeks ago and just this week one of our member servers(only running one application and SQL 2000) stopped resolving user names to give them access to that share. for example, we have one folder that has all documents in it and we need everyone in the co. to access it. when i right click on the folder, do the properties thing and go to the security tab, i try to add users to that tab to give them any kind of access, their name shows up correctly until i click apply, then it has trouble resolving the name and reverts it back to just a long number starting with "S" at the beginning. it just looks like some kind of ID. seems that something happened with dns, security, AD, we just can't locate the problem. Again, running windows 2000 sp4 with SQL 2000 on it and this is the only server it's happening to. please help! thanks guys!