Hey,the problem is "(objectcategory=user)", and a missing concatenation
of filter criteria. You should
try(&(objectCategory=person)(memberOf=CN=QA Users,OU=Help
Desk,DC=dpetri,DC=net))In fact, an Active Directory User is searched
exactly by this filter:(&(objectClass=user)(objectCategory=person))You
can learn all about LDAP filters
here:http://www.selfadsi.org/ldap-filter.htmPhilipp