Dear all samba users, We try to install a Samba files server as a member of a W2K network. The domain controler is a W2K server with Active Directories, Groups and users. We want to shared our linux disk with rigths in function of thoses groups and users. We use Samba 3 and a GNU/Debian sarge distribution. There is no problem to join the W2K network: $> net rpc join -U Administrator password: ... Joined domain MYDOMAIN. We see all groups and users: $> wbinfo -u guillaume foo faa fii ... $>wbinfo -g mygroup othergroup ... We can see the disk from the W2K network, no problems. The problem is that is I put as a valid users a user name it's not work: For exemple, my user name is guillaume and my group is mygroup: 1/ If I put in smb.conf the line: valid users = @mygroup it work, only members of mygroup (and so guillaume) can access to this folder 2/ If I put in smb.conf the line: valid users = guillaume It doesn't work, I cannot access to this folder with the guillaume user, and this is the same problem with invalid users, admin users ... only groups work. Do you know somthing about this problem, I try to search on google but it's difficult to explain for search ... Here is my smb.conf: # Global parameters [global] workgroup = MYDOMAIN security = DOMAIN printcap name = cups disable spoolss = Yes show add printer wizard = No idmap uid = 15000-20000 idmap gid = 15000-20000 winbind separator = + winbind use default domain = Yes use sendfile = Yes printing = cups [myshared] comment = This folder is shared path = /var/shared/ valid users = guillaume read only = No