Is it possible to have each org utilize the same IP space as each other. That is can all 5 Orgs in VCD utilize the same /24. All orgs have to be able to go out to their own MPLS connection, as well as a shared network segment with shared services. If each Org had their own IP space this would be pretty straight forward, but we are worried about conflicting IP space with the clients that are coming in through the MPLS.
Each VXLAN in VCD is segregated by design from the others, allowing overlapping IP ranges, You can obtain the same the same separation also when using external networks backed by VLANs. As long as the traffic goes straightforward from the VMs on the VCD VXLAN/VLAN to a dedicated MPLS device and then to the clients on the remote side (and viceversa) I don't see any problem.