Hi Yonathan,
I have performed some tests, and I could open an Excel file on the desktop app from OneDrive.
In order to further understand your actual situation and help you better, please offer me more information at your convenience, thanks.
- Do you see this issue with all the excel files you have on your OneDrive or some of them?
- Have you tried downloading the excel file and try you open it in the Excel desktop app? It will help us to isolate the issue with OneDrive.
- Do you see a pop-up when opening the excel file from OneDrive web app? If yes, click on the "Open Excel" button.
Tip: Close all the existing excel files on your local before opening the OneDrive Excel file on the desktop app.
After clicking on "Open Excel", If you have any excel open, then click on anywhere on excel cell to allow OneDrive file to open.
Regards
Nik
