In the window that appears, select Add-ins on the left-side ribbon.

In the next window, select the drop-down menu at the bottom and select Disabled Items and click Go...

In the next window, select the Newforma Outlook Add-in and click Enable.

Restart Outlook. The Newforma Add-In should show in the top ribbon of Outlook.
NOTE: If you still don't see it in the top ribbon, close Outlook, restart Newforma Project Center, and open Outlook. If that still doesn't show it, please open a help desk ticket with IT.