If you have a file that is sensitive to changes, you can force Microsoft Excel 365 to prompt the user to open as Read Only whenever they attempt to open the file. Here’s how to enable this setting.
Set Prompt While Saving File
Follow these steps to set the file to display the “Open as Read Only” prompt.
- In Excel, select “File” and click Save As.
- Ensure the file format box is set to “Excel Workbook“, then select “More options…“.
- Choose “Tools” > “General Options” at the bottom of the window.
- Select the check-box for “Read-only recommended“, then select “OK“.
- Select “Save“.
- If prompted, choose “Yes” to update the file with the read-only setting.
That’s it! Anybody who opens the file in Excel will now be prompted to choose “Open as Read-Only“.
Opening files as Read-Only
If the file has been saved using the above steps, you can directly open an Excel file as Read-Only using these steps:
- Hold the “Shift” button and right-click the file. An option will appear to “Open as Read-Only“.