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Review ->Changes ->Protect and Share Protect and Share If you are editing this spreadsheet in a group or department, you can Protect and Share your work.   Try it: Protect and Share Go to Review->Changes. Select Protect Sheet. Editing: The first tab displays who is currently working on the workbook.   Advanced: When you Share a Workbook, you can Track Changes. You can keep a history of all the changes and specify how many days you need to keep in the log.   If there is a conflict when two or more users are editing the same file, you can ask which changes win.