This parameter is only available if Samba has been configured and compiled with the option --with-utmp. It specifies a directory pathname that is used to store the wtmp or wtmpx files (depending on the UNIX system) that record user connections to a Samba server. The difference with the utmp directory is the fact that user info is kept after a user has logged out. By default this is not set, meaning the system will use whatever utmp file the native system is set to use (usually /var/run/wtmp on Linux). utmp /var/log/wtmp