You don’t mention which version of microsoft Word you are using….but if you save the document in outline view, it should always open in that view for you (view settings are stored as an individual document property).
I don’t think you can save Outline View to the normal.dot template, which controls default formatting and what not. You should be able to force always opening in a particular view by placing a macro in your normal.dot template, though. When opened, it will execute the macro, change the view, and you should be set. If it were me, though, I’d just leave Word’s default behavior and have the view and what not saved to the file, not applied to any and all documents.