Attachments / "Open in..." OWA for Devices
... is to be a target for an "Open in..." from other apps. Otherwise there is no way to add attachments.
And while you're at it, it might be helpful if the app was willing to "Open in..." attachments that it doesn't necessarily need to know how to open itself. Mindmaps, for example. I'd love to "Open in..." them in iThoughts.
Brooke Louise Jones's signature