Right now, I'm working with a Client who uses Dropbox for her excel spreadsheets and I've never been a fan. She requires me to make changes in the Excel file she has in her Dropbox and I am doing just that. But whenever I make a change or she makes a change in the sheet, we both can't see each other's changes and that is VERY BIG issue as we are working with real time customers and we have to contact as soon as they're on the sheet. Now, we have lost over 20 customers because of this issue and She still doesn't want to switch to any other tool (Like Google Sheet).
If someone has a way to fix this. please help me out.