Hi. After an crash and reboot, some users can't login on some machines. There are running Samba 3.0.6 as a PDC with W2k-Clients only. If someone logs in on a machine he has once logged in before, he comes in. But if someone tries to log in an a machine that contains no local copy of the roaming profile, the user will be rejected. in the first days, there was another message: "an attached device could not been found". If i try smbclient -L \\samba-server -U user , I pass. Even I can't add a new machine in the domain (usual way: net use * /d, then in the window networkidentification change from workgroup to Domain, answer the user/passwort phrase with root/<password> -> access denied). There are no changes at the smb.conf since months so I don't think there is a problem. On the way to track down the problem I stumble over my group_mappings.tdb. All mappings points to -1. In my opinion, the Domain_users have to point to the unixgroupusers and the Domain_admins have to point to the unixgroup admins (self-defined unix-group). But if I set this up (net groupmap modify ntgroup="Domain_Users" unixgroup="users") nothing changes. (exept the admins can add/del Domain-Users from certain NT-rights). Has anyone out there an idea? greetings Andy P. Sorry for not posting any logs or files. I'm writing here from home and have no connection to the Samba-Server at the moment.