The following collaboration issue causes a minor loss of fidelity:

Issue Solution
This workbook will be read-only and shared workbook features will not be available when someone opens it in an earlier version of Excel by using a file converter. To allow users to continue using the workbook as a shared workbook in earlier versions of Excel, you must save it in the file format of the earlier versions. To keep sharing the shared workbook with users who use earlier versions of Excel and to ensure that all shared workbook features are available in the earlier versions, you should save the workbook in the Excel 97-2003 file format.

For more information, see: