I have been struggling to find a guide which teaches me how to do this quickly. Most guides I found requires the use of VBA or an additional plugin. After multiple trial and error attempts, I found a way convert HTML to OFT using only Outlook 2016.
- Click New Email
- Click this button on the toolbar.
- Add Attach File (Not “Attach File…”)
- A Paperclip button should now be added to the toolbar.