Applies To: 2016 Microsoft products including Excel 2016, Word 2016, PowerPoint 2016 etc 

How to password protect an Excel or Word Document:

• From the open Excel or Word document, click the File tab.
• Under Info, select Protect Document.
• From the drop down, select Encrypt with Password.
• For Password, enter desired password.
  • Note: If you lose or forget this password it can not be retrieved.
• Click the Ok button.