I have finally got Samba machine to join the NT domain with the this linux command "smbpasswd -j Domain -r server". I am still having problem accessing the share that I created on the Linux machine. It still prompt me for my user name and password when I try to connect to it. I can connect to it if I enter in the user name that I created in the linux machine but I can attach to it using the NT user name. One of the Samba document ask me to create a "domainuser.mapping" file to map Unix name to NT user name (eg. root = administrator). I did create that but I don't know where to put the file. Does anyone know how to set up Samba to authenticate with a NT PDC domain properly? Or even where I can find information on how to perform this. I am trying to setup Samba as a file server and only allow certain NT user to access certain share base on the NT logon authentication. Hung Hua, MCSE System Administrator ObjectWorks, Inc. ph: (403) 237-7333 Ext.14 fax: (403) 237-7380 e-mail: hhua@objectworks.com