What are recommended and best practise workflows in collaboration between OEM and suppliers without using VPN. In my case both companies have separate 19x on premise but are in need to collaborate on design of specific project(machine). OEM is defining concepts and Supplier is doing detail design and sends to OEM for design review and updates of concept. As i see we set up specific collaborative space in both 19x OP environments for this project and do export-import of 3dxml with authoring?