Hello, I am using samba 4.1 sambaSID in my server alway change a new value after reboot. What wrong in my config? and How can sambaSID be stable? Thanks all! This is my samba server config: [global] workgroup = NISCI netbios name = NISCI server string = %h server (Samba, SAMBA) ;enable privileges = yes interfaces = lo eth1 bind interfaces only = yes passdb backend = ldapsam:ldapi://%2fvar%2frun%2fslapd%2fldapi ldap ssl = off log level = 1 syslog = 0 log file = /var/log/samba/idc-smb.%m max log size = 1000 vfs objects = full_audit full_audit:success = connect opendir open disconnect unlink mkdir rmdir rename full_audit:failure = none smb ports = 139 1139 445 1445 name resolve order = wins bcast hosts time server = yes load printers = no printing = cups wins support = yes ldap suffix = dc=boxAA,dc=boxx,dc=boxx ldap user suffix = ou=Users ldap group suffix = ou=Groups ldap admin dn = cn=ldapadm,dc=boxx,dc=boxx map acl inherit = yes security = user encrypt passwords = yes obey pam restrictions = no ldap passwd sync = yes mangling method = hash2 os level = 65 preferred master = yes domain master = auto usershare allow guests = yes include = /etc/samba/personal.conf And smbldap.conf: SID="S-1-5-21-325056222-3979360573-588988473" sambaDomain="NISCI" masterLDAP="localhost" masterPort="389" slaveLDAP="localhost" slavePort="10389" ldapTLS="0" verify="none" cafile="/noexist" clientcert="/noexist" clientkey="/noexist" suffix="dc=boxAA,dc=boxx,dc=boxx" usersdn="ou=Users,${suffix}" groupsdn="ou=Groups,${suffix}" sambaUnixIdPooldn="sambaDomainName=${sambaDomain},${suffix}" scope="sub" hash_encrypt="SHA" crypt_salt_format="%s" userLoginShell="/bin/bash" userHome="/export/users//%U/" userHomeDirectoryMode="700" userGecos="iDragonCloud User" defaultUserGid="48" defaultComputerGid="49" skeletonDir="/etc/skel" defaultMaxPasswordAge="45" userSmbHome="\\NISCI\%U" userProfile="\\NISCI\profiles\%U" userHomeDrive="H:" userScript="logon.bat" mailDomain="" with_smbpasswd="0" smbpasswd="/usr/bin/smbpasswd" with_slappasswd="0" slappasswd="/usr/sbin/slappasswd" This my Log: The primary group domain sid(S-1-5-21-841725493-689295434-2902749832-513) does not match the domain sid(S-1-5-21-325056222-3979360573-588988473) for 1162043(S-1-5-21-325056222-3979360573-588988473-5086) [2014/12/02 09:35:05.546521, 0] ../source3/auth/check_samsec.c:492(check_sam_security) check_sam_security: make_server_info_sam() failed with 'NT_STATUS_UNSUCCESSFUL' [2014/12/02 09:35:05.605862, 1] ../source3/auth/server_info.c:346(samu_to_SamInfo3) The primary group domain sid(S-1-5-21-841725493-689295434-2902749832-513) does not match the domain sid(S-1-5-21-325056222-3979360573-588988473) for 1162043(S-1-5-21-325056222-3979360573-588988473-5086) [2014/12/02 09:35:05.606110, 0] ../source3/auth/check_samsec.c:492(check_sam_security) check_sam_security: make_server_info_sam() failed with 'NT_STATUS_UNSUCCESSFUL' [2014/12/02 09:35:05.657556, 1] ../source3/auth/server_info.c:346(samu_to_SamInfo3) The primary group domain sid(S-1-5-21-841725493-689295434-2902749832-513) does not match the domain sid(S-1-5-21-325056222-3979360573-588988473) for 1162043(S-1-5-21-325056222-3979360573-588988473-5086) [2014/12/02 09:35:05.657801, 0] ../source3/auth/check_samsec.c:492(check_sam_security) check_sam_security: make_server_info_sam() failed with 'NT_STATUS_UNSUCCESSFUL' [2014/12/02 09:35:05.709828, 1] ../source3/auth/server_info.c:346(samu_to_SamInfo3) The primary group domain sid(S-1-5-21-841725493-689295434-2902749832-513) does not match the domain sid(S-1-5-21-325056222-3979360573-588988473) for 1162043(S-1-5-21-325056222-3979360573-588988473-5086) [2014/12/02 09:35:05.710072, 0] ../source3/auth/check_samsec.c:492(check_sam_security)