Question : LDAP Query - Exclude Exchange Users Hidden from Address Books

How can I change an LDAP Query to stop Exchange users who have been hidden from Address Lists from showing up? All I use at the moment is;
(objectClass=user)

Answer : LDAP Query - Exclude Exchange Users Hidden from Address Books

Sorry, was typing too quicklly (and it's too early in the morning):


(&(objectClass=user)(objectCategory=Person)(!msExchHideFromAddressLists=*))

In other words: "show me the users where this attribute has NOT been set to any value."