Ivan H Dichev wrote: I've found a threat in Samba forum, about an issues with Win7 and Samba observed by Alex Ferrara. <http://lists.samba.org/archive/samba/2009-December/152353.html> http://lists.samba.org/archive/samba/2009-December/152353.html As I understood, you had similar errors while ago.. Did you realized what was the problem ? Hi Ivan, There appear to be (at least) two possible issues. If a workstation is left switched on, or hibernates instead of being switched off, its machine account password can get out out of sync with the server. See Gaiseric Vandal, 30 June 2011 03:57, 'Re: [Samba] Windows 7 caching credentials breaks with hibernation'. The other is that in newer Samba versions (samba3-3.4.9-42.el5 and samba3-3.5.9-44.el5) when a machine joins the domain its username is in upper case in the Samba password database but in lower case in the Linux password database. This results in errors in the Samba logs and possibly other authentication and lookup issues. To fix that last one I am replacing the normal 'add machine script' with this: add machine script = /var/lib/samba/scripts/machineadd.sh "%u" where /var/lib/samba/scripts/machineadd.sh is: #!/bin/bash # # Join a machine to the domain # machine=`echo $1 | tr '[[:lower:]]' '[[:upper:]]'` /usr/sbin/useradd -n -g machines -c Machine -d /dev/null -s /bin/false -K MAIL_DIR=/dev/null "$machine" The '-K MAIL_DIR' thing stops a mailbox being created in /var/spool/mail. It works on RHEL/CentOS, but perhaps not all Unixes have that option. For SELinux systems, the script's security context needs to have type samba_unconfined_script_exec_t. Best to keep this sort of discussion on-list so that others can benefit or contribute. Moray. "To err is human; to purr, feline."