Excel Extension

Hello! I'm attempting to create an excel extension template to summarize location edit. As part of the header, I am attempting to included the coordinate system.

I've tried to add it using Insert>Project Details>Coordinate System, but nothing is entered when I run the report. Other project details (site name, identifier, etc) populate just fine using this method. I've tried running the report with several projects using different coordinate systems, but nothing shows up.

Any thoughts? Is there another way to pull the coordinate system into the template?