I am getting the following error in the logs. Though we are supplying the correct user name and password to login to the website. The LDAP is giving this error.
data 773 means you need to reset the password
Please check this article for further knowledge : http://www-01.ibm.com/support/docview.wss?uid=swg21290631
This link is helpful :)
http://ldapwiki.willeke.com/wiki/Common%20Active%20Directory%20Bind%20Errors
Your problem is due to:
'Password Expiration: Entry's password must be changed before logging on LDAP pwdLastSet: value of 0 indicates admin-required password change - MUST_CHANGE_PASSWD'