Open Microsoft Excel and select the sheet you want to lock. Make the required changes. When you are ready to share, click File at the top. Select Info from the sidebar. Select Protect Workbook.

How to Unlock Protected Spreadsheets. You can't edit or copy the contents of a protected Excel worksheet unless you first unlock the protection. If unlocking the worksheet doesn't require a ...

If the worksheet is password-protected, Excel will not unlock the menus until you enter your password.