I removed the logfile, it was just too big :-) OK, after a quick scan, I found this information: netbios name = GALACTICATEST realm = TEST.ad-domain.DE workgroup = TEST and it knows about 'TEST': No home directory defined for user 'TEST\GALACTICATST$' No home directory defined for user 'TEST\Administrator' But it seems to be using the netbios name as a domain and realm: auth_check_password_send: Checking password for unmapped user [GALACTICATST]\[Ingo]@[GALACTICATST] I take it that 'Ingo' is a domain user. What do you get if you run: wbinfo --all-domains on the DC ? I would expect 'BUILTIN' and 'TEST' Rowland