Unable to Search on a Calculated Field in SmartFill

Issue:

You are using SmartFill and have created a calculated field. You would like to mark the Search checkbox for the calculated field but the box is unavailable.

More Information:

Calculated Fields are fields that you define to display information that is not stored in a table field in the database. While these Calculated Fields cannot be displayed in the Make a Selection window, you can use a Calculated Field to provide more information regarding the records you are searching. They may not be used as searchable fields.