• Open the relevant Excel spreadsheet.


  • Select the Review tab then Share Workbook.



  • Tick the tick box shown below.



  • Under the Advanced tab, check all options are correct (Usually defaulted to correct settings).



  • The Ask me which changes win option should be selected to prevent data loss.


  • Once happy, select OK and save the document.


Please note: All changes will only sync once spreadsheet is saved so remember to do this frequently.