The operational attributes contained in an entry can be returned by ldapsearch by:
Explicitly listing them
ldapsearch -x -h host:port -b c=au "(oc=*)" createTimestamp modifyTimestamp
Or by returning all of them with the special + character
ldapsearch -x -h host:port -b c=au "(oc=*)" +
Or all attributes including operational attributes can be returned by including "*" +
ldapsearch -x -h host:port -b c=au "(oc=*)" "*" +