Word Online and Document Information Panel - not able to edit content in field

I created a document library with a document template that is essentially a form where people enter in fields. I would like those fields to then also show up in the meta data for the document, so I created the columns and put the document information panel fields into the word document.

The issue I am having is that those fields are only editable in the Word application, and not editable in Word Online. I want people to be able to edit the contents of the file in the browser, and not require the desktop Word application.

How would I go about having people edit the document info panel properties while in the Online version of Word?