You can lock a file to make it read-only and prevent it from being accidentally deleted. Lock or unlock a workbook to make it read-only

If you want to remind everyone that a workbook should only be changed if necessary, you can recommend that the workbook be opened as read-only.

If your file opened in Microsoft Office as "Read-only", and you're not sure why, this article can help you remedy that situation.

Excel gives you the ability to protect your work, whether it’s to prevent someone from opening a workbook without a password, granting Read-Only access to a workbook, or even just …

When you want others to view your Excel for the web workbook but not make any changes to it, you can share it as a read-only workbook. Select File > Share > Share with People (or select …

If you don't want content reviewers to accidentally modify your document, you can make the document read only before sending it for review. Another method is to restrict formatting and …

If you don't want content reviewers to accidentally change a Word document or an Excel spreadsheet, you can use formatting and editing restrictions. Note: To further restrict reviewers …

If you want to update PivotTables in this workbook, there are several approaches you can take: Open the workbook in Excel for the web, which uses an up-to-date version of Excel. …

When you try to open a Excel workbook, PowerPoint presentation, or Word document on your mobile device, you might receive a message stating that the file is locked for editing by …

You can add a password to an Excel file to prevent unauthorized users from opening or modifying it.