In Chapter 3, Storing Data, you learned that there are two standard table groups in all
tables in AX. One of these table groups is the AutoLookup. This table group is used
to create a lookup form when users press the lookup button in a form.
However, you may sometimes need a lookup that has extended functionality. Maybe
it only shows a limited set of records from the table based on some logic, or maybe,
in some cases, you have to present additional fields in the lookup form.
In these cases, you will have to create a customized lookup form. This can be
achieved in two different ways