Hi I have just setup a samba 2.2.8.a server as a Member Server in my Windows 2000 Domain. I want to use the security=domain option (see smb.conf below)... But when I view the Windows permissions through the Windows security dialogue window there a 2 Major Issues. One: it identifies all users as...... user1 {LIATH223\user1} instead of ......... user1 {user1@dom.dd.com} where "dom" or "dom.dd.com" is our Windows 2000 domain, and LIATH223 is the hostname of the Samba server ! Two: When I try to "add" a user to the files permissions, it allows me to browse through the list of users, ADD, select the exact permissions, BUT, when I click "apply" or "OK" it removes the newly added user ! Heres my smb.conf file [global] workgroup = DOM security = DOMAIN encrypt passwords = Yes password server = domaincontroller username map = /var/lib/domainuser.mapping [homes] comment = Home Directories valid users = %S read only = No browseable = No One final question I have is regarding the format of the domainuser.mapping file, is it user1 = DOM\user1 user1 = \\DOM\\user1 user1 = dom\user1 ??? Any help would be greatly appreciated! Rgds Rob