sql server - Excel does not import Guids (Unique Identifiers) when importing data using the "External Data" feature

When I try to use Excel 2013 to import External Data from a SQL Server Data Source, it does not import the Guids.

The Query I'm using is:

SELECT * FROM TABLENAME

The table Structure is:

ThingId uniqueidentifier,
ThingName nvarchar(50)

When I explicitly ask Excel to import just the uniqueidentifier, it imports nothing (query):

SELECT ThingId from TABLENAME

How do I get Excel to import Unique Identifiers (GUIDs) when I use the "External Data" feature?