Unpivoting Variable Number of Columns

Hello,

My dataset is an Excel file that is generated by a very inflexible program.  In order to make functional tables, I need to unpivot the columns.  My problem is that the number of columns in the Excel file changes every time the file is generated.

My data looks like this:

Date | Property | Product 1 | Product 2 | Product 3 .......

When I unpivot the Product columns the formula is:

= Table.Unpivot(#"Changed Type", {"Product 1", "Product 2", "Product 3", .... }

How can I change the function to unpivot all columns from column #3 up to (and including) the last column?

Thanks!