If you have sensitive data you'd like to keep from prying eyes in a Microsoft Excel file, the easiest way to protect it is with Excel's built-in password tools.

There are several options available to you to protect your Excel file with a password. Remember that once you protect the Excel file, you cannot open it without entering the password.

In other words, your file will get expired at 11:59 PM on the specified date. How to set Password when sharing Excel files online To set a password when sharing Excel files online, follow these steps: ...

If multiple users work in the same Microsoft Excel file, you can limit their access to only the ranges where they need to work.

Excel Add-Ins are applications written by independent programmers that provide enhanced capabilities for the primary software. Here's how to install, manage, and choose the best Add-Ins available.