Work together with your team on a 3DVista project
You can use File > Export > Create Project backup with media
Then open that vtp file and keep saving that vtp file or save as [new file] within that exact same folder. Then synchronize that folder over any cloud service that you partner can access as well. When one of you is ready editing and presses save, the other person can continue working on the project when the saved vtp file is synced on his or her machine.