On the File menu, click Info. Click on Protect Workbook and select the Always Open Read-Only. See also Prompt to open a workbook 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.

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 from making …

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 protecting a …

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. Note: Prompting to open as read-only will …

Making your document a read-only file means that the document can be read or copied but not modified. If one of the reviewers tries to make changes to a read-only file, the changes can be saved only by …

Enable editing in your document If you receive or open a document and can't make any changes, it might be Open for viewing only in Protected View. One of the options below can help you:

This locks the file, preventing any further editing. You can easily turn off this feature in the Microsoft 365 applications; however, you can’t turn it off from your mobile device. If an Office file is marked Final, …

Linking to other workbooks is a very common task in Excel, but sometimes you might find yourself with a workbook that has links you can’t find even though Excel tells you they exist.

For example, in a workbook Ranjit creates, he might give Helena permission to read but not change it. Ranjit can then give Bobby permission to edit the workbook.