In tracking down several odd things that are happening in our RedHat 7.3 Samba 2.2.8 environment I found that the users are only authenticating with plaintext passwords. If I run wbinfo -a auser%xxxx all I get back is: "plaintext password authentication succeeded" No mention of Challenge/Response at all. In addition one of the three machines refuses to recognize the groups from the Win2K PDC for commands like chgrp despite wbinfo -u, wbinfo -g and getent group properly displaying the domain groups. This has driven me nuts for several days now so any help would be appreciated.