Sure, but I think it can be easier to do. VPNs require some setup so it's not as ad-hoc as you want for sharing files between two offices. The HTTPS server is w

Sure, but I think it can be easier to do. VPNs require some setup so it's not as ad-hoc as you want for sharing files between two offices. The HTTPS server is what many offices do now when they deal with a lot of secure document exchange to clients (law firms, accountants, etc). Again, not bad but requires them to setup an on-prem public server to have equivalent security to peer-to-peer. The opportunity is to take some steps out of the process.