To query for a particular user account in AD we can use filter like follows.
Sample filter for Active Directory
"(&(objectClass=user)(sAMAccountName=hassan*))"
The above filter will look for all objects which are type user and will return the username starting with hassan. If you are using cn attribute in your LDAP, then it can be modified to something like follows.
This assumes that the object class is user
"(&(objectClass=user)(cn=Hs Ya Chung*))"
I hope this helps. Please feel free to get back to us, if you need to further discuss this.
