All users should be able to do this without elevated system permissions. Installing/Enabling the add-in on your Outlook account – The one-time process for enabling the add-in from the 365 store.

This document is broken into three parts: The Adobe Sign for Outlook add-in allows a user to configure a new agreement from within their email client by either composing a new email, starting from a blank slate, or by replying to an existing email, importing the recipient list, and automatically attaching any files from the source email.