4. Automated Import of Virtual Machines to vCloud Director : 4.8 Workflow: Create external networks and organization VDC networks from VMs list : 4.8.2 Workflow Steps
   
4.8.2 Workflow Steps
1. Get all of the vCloud host's vCenter Servers.
2. Find the vCenter Server that hosts the virtual machines to import.
3. Get the list of all virtual machines network references.
4. Get the list of the external networks references that back the organization virtual datacenter networks.
5. Match the two lists to find the external networks that should be created.
6. For each of these run the Add external network and organization virtual datacenter network workflow.