How to Digitally Sign or Encrypt Emails in Outlook Online Share April 10, 2020 Dm4r Technology Outlook Online lets you digitally sign or encrypt your emails, either individually or by default for all outbound messages. If this is something you need to do, here are the instructions to get it up and running. Read This Article on How-To Geek › Source : How to Digitally Sign or Encrypt Emails in Outlook Online