HP A4500A - VMEbus Single Board Computer 744 Motherboard Release Note page 14

CIFS/9000 Client A.01.08
Known Problems and Workarounds
14
For PAM NTLM
The passwd(1) program may not return any message (Success or
Failure) in some cases. For example, if the user tries to change his
password when the "user cannot change password" option is set on the
NT server, the passwd command does not return a message. In such
cases, check the return value of the passwd command (passwd returns
zero for success) and the syslog file (/var/adm/syslog/syslog.log).
Chapter 1