Allow upload of Excel files in the Notes. Its easier
Currently it allows only text, pdf and images. Excel should be allowed as well. xls and xlsx both.
We can look into expanding the types of files allowed for upload in the future.
lewis hamilton commented
To do this, open your OneNote notebook, selecting the note to insert your existing spreadsheet. From there, click Insert > Spreadsheet > Existing Excel Spreadsheet. In the Choose Document to Insert window, locate the Excel spreadsheet to insert. Select it, then press the Insert button.