As per this Microsoft post , it is impossible to add add-ins to Outlook for Mac if you are using IMAP accounts. So I cannot install the Evernote add in. (I have Outlook for Mac latest version 16.11 Office 365 subscription).
I can forward emails to Evernote using my Evernote email address, but sometimes the formatting is lost/distorted - on some emails from Outlook, not all. The formatting issue may be related to tables embedded in the email. The emails become almost useless because of the lost formatting in Evernote. I have raised this issue with Evernote support, but it was never resolved.
I was hoping the Evernote add in might make things work better, but of course, I cannot even install it. So frustrating, as the same email works perfectly and keeps its formatting when forwarded from Gmail, but loses it when forwarded from Outlook. So it is definitely some sort of Evernote-Outlook integration issue.
I seem to be up against a wall on this one.