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.

If Excel keeps blocking files from being inserted, chances are the file is blocked by Trust Center, or maybe the workbook or locked. Here's the fix!

In Word, Excel, or PowerPoint for Windows, open the file you want to protect with a password, then select File and Info. You should see a Protect option at the top of the next list: Click this ...

One of the most notable additions to Microsoft's 2007 Office System was the Trust Center, which centralizes the security options in Word, Excel, Outlook, PowerPoint, and the other applications in ...

To fix the Unknown error trying to lock file in Teams, Excel, OneDrive, PowerPoint, SharePoint, etc, Office apps use these proven solutions.