Where did "HTML options" go in Outlook 2007/2010?

In previous versions of Outlook, if I wanted to embed a link <a href=…>) to a picture instead of embedding the actual picture in emails, I would go to Tools-> Options-> Mail Format tab-> Internet Format button and in the dialog under the heading “HTML options” I would uncheck: “When an HTML message contains pictures located on the Internet, send a copy of the pictures instead of the reference to their location.”

But this heading and checkbox don’t exist in this location on Outlook 2007 or Outlook 2010.
Has it moved to a new location?

It appears the option or feature still exists, as another user with Outlook 2007 that upgraded from Outlook 2003 who had that option unchecked prior to the upgrade sends mail with links instead of pictures just fine.

I’m guessing it was stored in the registry somewhere and was picked up after the upgrade, but how can I with a clean install have the same setting?