Are custom lookup fields searchable with the (All Fields) Search Enhanced Lookup on a Custom Object?
In this example: I have a "Well" (Custom Object) record that has a look up relationship to a "Rig" custom object. If I type in the name of the Rig into an enhanced lookup on a different record it returns no results (I confirmed that the 'All Fields' selection was made) on the lookup search box.
Any ideas?