What is microsoft office file validation add in nedir?

Microsoft Office File Validation Add-in is a security feature designed to help prevent malicious attacks that could occur through the use of certain file formats in Microsoft Office applications. It works by verifying that a file conforms to the Office File Format before opening it. This ensures that the file is safe and free from any malicious code or viruses that may harm the user's computer. The add-in is compatible with Microsoft Office 2010 and later versions and can be downloaded from the Microsoft website for free.