The shared workbook has been saved in a file format that is supported in the current version of Excel. To keep this workbook ...

The shared workbook has been saved in a file format that is supported in the current version of Excel. To keep this workbook synchronized with changes that other shared workbook users make by using the new file format, you need to close and reopen the workbook.  • Click OK to close and reopen the workbook. • Click Cancel to view it read-only.