Dear All, I've found that Samba 4.1.2 do have the userpassword attribute on AD. I check with my existing LDAP attribute. http://msdn.microsoft.com/en-us/library/cc220977.aspx It seem that this can also be use for shadow password. I'm using JXplorer to view it... if there any samba tools we can use to modify it value? As when I would like to change this attribute value. I've a prompt saying "All Mandatory Attributes must have values!" I believes it was caused by "nTSecurityDescriptor" http://msdn.microsoft.com/en-us/library/cc220993.aspx I've no idea on what is this and how it is use... Any suggestion is welcome..............