Ray,
I'm not completely sure how to go about what you described, but one thing you could consider is using the deeplink module. With this module you can provide a link to the document you want to attach in the outlook email and then a user can download the file if they wish.
Here is a link to the deeplink module
https://appstore.home.mendix.com/link/app/43/Mendix/Deep-link-module
Ray,
Within the standard email with templates module from the appstore you can when you create the mail attach any Mendix filedocument as attachment to the mail. Or am I missing the point here.
Regards,
Ronald