Introduction

Microsoft 365 (previously called Microsoft Office) is a productivity suite for Microsoft Windows. The Microsoft 365 applications include Microsoft Word, Microsoft Excel, and Microsoft PowerPoint. Microsoft 365 also permits users to create, control, and digitally sign documents.

You can integrate Microsoft 365 with a Entrust Time Stamp Option Pack to permit the use of time stamping to seal documents. The Entrust Time Stamp Option Pack is referred to in this guide as Time Stamp Server (TSS). TSS is a time stamp appliance, which uses the industry-standard IETF RFC 3161 protocol to provide time stamps. TSS also provides a secure auditable trail of time for the purposes of nonrepudiation. In this way, you can time stamp an Microsoft document to validate that document’s authenticity at the time it was time stamped.