Connecting one vCloud Organization Network to another isn't easy, and most of the time, rather impossible. However, this is how it works, the easy way.
We need two organizations, each with an Edge configured as well as an Organization Network that connects to the Edge. Make sure that the Organization Networks have different IP ranges (for example, 192.168.2.0/24 and 192.168.4.0/24).
For testing, we need vApps in both organizations that have VMs that are connected to the Edge.
Enter the organization (either one).
Click on Cloud Resources and then double-click on the OvDC you have created.
Click on Edge Gateway.
Right-click on the Edge and select Edge Gateway Services.
Click on VPN.
Check Enable VPN as shown in the following screenshot:
Click on Add to add a new connection. You should now get the following screen:
Name the connection and select a network in another organization under Establish...