Digital Signatures in Microsoft Office 365

SignatureDigital signatures provide legal non-repudiation for electronic documents, and are just as binding as signatures in ink on a paper document. When you send your colleagues and customers a Microsoft Word document, Excel workbook, or PowerPoint presentation signed with an Business Email, Client Authentication, and Document Signing Certificate, they can be assured that your identity, company, and email address have been independently validated by a publicly-trusted certificate authority (CA). They can also rest assured that the content of the document has not been altered by any third party after being signed.

Our new guide to Digitally Signing Microsoft Office 365 Documents walks you through adding digital signatures to Word documents, Excel workbooks, and PowerPoint presentations. In addition, Viewing Certificate Information in Signed Microsoft Office 365 Documents shows you how to view validated information about the signer that is included in signed Office documents that you receive from others.