I have samba-3.0.23d with krb -1.3.4 connecting to a 2003 AD Server. While connection from a windows client, it won't accept the correct username and password. This is from log.machinename: [2007/01/04 14:43:26, 1] smbd/sesssetup.c:reply_spnego_kerberos(202) Failed to verify incoming ticket! [2007/01/04 14:43:26, 1] smbd/sesssetup.c:reply_spnego_kerberos(202) Failed to verify incoming ticket! [2007/01/04 14:43:26, 1] smbd/sesssetup.c:reply_spnego_kerberos(202) Failed to verify incoming ticket! [2007/01/04 14:43:26, 1] smbd/sesssetup.c:reply_spnego_kerberos(202) Failed to verify incoming ticket! [2007/01/04 14:47:34, 1] smbd/sesssetup.c:reply_spnego_kerberos(310) Username DOMAIN\username is invalid on this syste kinit works fine. [root@samba]# kinit -V Password for username@DOMAIN Authenticated to Kerberos v5 log.winbindd [2007/01/04 14:43:31, 1] nsswitch/winbindd_user.c:winbindd_getpwnam(161) user 'username' does not exist any idea?