Hi @KIMBERLYREA - We normally will turn the Excel file into a PDF to upload it to the proofing tool. It definitely requires taking a minute to get the settings right to make it readable in a PDF, screenshot example below.
It would also depend how complex of a file it is...another suggestion would be hosting on a web-based tool (like a CDN) and adding it as an interactive link.
Feel your pain with the limited Excel options!
![VictoriaLinn_0-1697653679443.png VictoriaLinn_0-1697653679443.png](https://experienceleaguecommunities.adobe.com/t5/image/serverpage/image-id/65064i7A427DBA9D83DFD2/image-size/medium?v=v2&px=400)