To shield the legitimacy of a document's content, Office.com/setup 365 entitles its users to add an invisible digital signature. Different apps have the feature to add and remove this security feature. Signed documents have the Signatures push button at the foot of the document that allows you or the allowed person to access the file. Users with an active account on Office.com/setup can leverage this security attribute. In order to apply this change to your files and folders, you need to keep your software updated so no error takes place while you add the signature. The invisible Digital signature is a feature of Microsoft Office Word, Excel, and PowerPoint. To protect your document saved in any of the file formats, the following steps will help you add a digital signature. The steps are the same for Word, Excel, and PowerPoint. Steps to add invisible digital signature Login to www.office.com/setup and go to your profile Open any...