when do you want to protect your excel file from unwanted use or any wrong editing ,this becomes necessary to add a password to the pdf file.
how-to-unlock-sheet-of-excel-xlsx-file
In order to adding a password to a pdf file first step is open the excel file with Microsoft excel and select file menu.
Now select Info >protect workbook>Encrypt with password
Entre the password you want to set
and press ok
save this, your excel file will be saved as password protected file.
you can check this,user will be asked to entre the password.
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