Ok, I have a good understanding of what the procedure is for sharing a model between offices of the same architecture firm, but what happens when you need to share it between two different firms? Obviously you wouldn't allow the firm you're working with to access your network, and passing the model back and forth is cumbersome, not to mention a coordination nightmare. So what is the solution? I know there are file hosting website out there, but is that a viable solution? We have partnered with a firm who is new to Revit, couple that with the model sharing problem and the process has been difficult. We are slated to begin another project in the next few weeks so I'd like to figure out a better way of doing things. Any help would be appreciated.