Protect and Unprotect
To prevent others from accessing data in Excel files, protect Excel file with a password.
To prevent other users from viewing hidden worksheets, adding, moving, deleting, or hiding worksheets, and renaming worksheets, you can protect the structure of your Excel workbook with a password.
To prevent other users from accidentally or deliberately changing, moving, or deleting data in a worksheet, you can lock the cells on your Excel worksheet and then protect the sheet with a password.
Protect and unprotect the shared workbook.
Protect the authenticity of a document’s content, you can add a digital signature.