Outlook will let me know at the top of my message that my policy has been applied and which permissions it will restrict or allow. Outlook will tell me what this policy entails, and I can hit the Back arrow to return to my message. I’m going to choose the Do Not Forward option. Then, select the File tab from the ribbon, and from the Info pane, select the dropdown labeled Set Permissions. I’m going to show you how to apply an Information Rights Management policy to an email in Outlook. With Office 365 and Information Rights Management, you can set permissions on your emails or office files to help keep company data secure.