How do I fix expiring passwords of Samba users?

can you please provide output of /etc/samba/smb.conf

Thanks
~Jeet

smb.conf settings from ldap server:
#======================= Global Settings =======================

[global]
   workgroup = MySambaDomain
   server string = %h server (Samba, Ubuntu)
   netbios name = ldap1
   wins support = yes
   dns proxy = no
#### Networking ####
   interfaces = 127.0.0.0/8 eth0
   hosts allow = 127. 192.168.1. 10.8.2.
; bind interfaces only = yes
#### Debugging/Accounting ####
   log file = /var/log/samba/log.%m
   max log size = 1000
   syslog = 0
   panic action = /usr/share/samba/panic-action %d
####### Authentication #######
   security = user
   encrypt passwords = true
# LDAP Settings
   passdb backend = ldapsam:ldap://localhost
   ldap suffix = dc=MyDomain,dc=com
   ldap user suffix = ou=Users
   ldap group suffix = ou=Groups
   ldap machine suffix = ou=Computers
   ldap idmap suffix = ou=Idmap
   ldap admin dn = cn=admin,dc=MyDomain,dc=com
   ldap ssl = no
   ldap passwd sync = yes

   obey pam restrictions = yes
   unix password sync = no
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
   pam password change = yes
   map to guest = bad user

########## Domains ###########
    domain logons = yes
   logon path =
   logon drive = Z:
   logon script = %U.bat
add machine script = /usr/sbin/smbldap-useradd "%u"
add machine script = /usr/sbin/smbldap-useradd -W "%u"
add group script = /usr/sbin/smbldap-groupadd -a "%g"
########## Printing ##########
# load printers = yes
    load printers = no
############ Misc ############
; include = /home/samba/etc/smb.conf.%m
    domain master = yes
        enhanced browsing = yes
    local master = yes
    preferred master = yes
    os level = 255
; winbind enum groups = yes
; winbind enum users = yes
   usershare allow guests = yes
#======================= Share Definitions =======================
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/etc/samba/smb.conf settings from server with shares

[global]
   workgroup = MySambaDomain
   server string = ServerName cluster
   netbios name = ServerName
   wins server = xxx.xxx.xxx.xxx
   dns proxy = no
#### Networking ####
    interfaces = br0
#### Debugging/Accounting ####
   log file = /var/log/samba/log.%m
   max log size = 1000
   syslog = 0
   panic action = /usr/share/samba/panic-action %d
####### Authentication #######
   security = user
   encrypt passwords = true
        passdb backend = ldapsam:"ldap://ldap1.sub.MyDomain.com ldap://ldap2.sub.MyDomain.com"
        ldap admin dn = cn=admin,dc=MyDomain,dc=com
        ldap suffix = dc=MyDomain,dc=com
        ldap user suffix = ou=Users
        ldap group suffix = ou=Groups
        ldap machine suffix = ou=Computers
        ldap idmap suffix = ou=Idmap
        ldap ssl = start tls
        ldap password sync = yes
        obey pam restrictions = yes
   unix password sync = no
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
   pam password change = yes
   map to guest = bad user
########## Domains ###########
   domain logons = yes
   local master = no
   logon path =
   logon drive = Z:
   logon script = %U.bat
########## Printing ##########
   load printers = yes
   printing = cups
   printcap name = cups
############ Misc ############
   domain master = no
#======================= Share Definitions =======================
[netlogon]
   comment = Network Logon Service
   path = /srv/export/samba/netlogon/
   guest ok = yes
   read only = yes
[printers]
   comment = All Printers
   browseable = no
   path = /var/spool/samba
   printable = yes
   guest ok = no
   read only = yes
   create mask = 0700
[print$]
   comment = Printer Drivers
   path = /var/lib/samba/printers
   browseable = yes
   read only = yes
   guest ok = no
#============================ Share Definitions ==============================
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