A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Even if you open a document or a file from the email and edit it and then save it then you would lose the original document and you would get a new edited document as a product.
If you are logged into your account on some other device like a smartphone. Then I suggest you try downloading the email attachment from there if there, the document is unedited.
OR
Ask the sender to resend you the email.
Note: Once you save the edits to a document you lose the original content of that document.