Excellent it's work !!!
Thank you very much !!!
Now I would to connect two UCS server with OpenVPN4UCS.
Site A: UCS Master DC, with subnet 192.168.2.0, and many workstations.
Site B: UCS Slave DC, with subnet 192.168.3.0, and many workstations.
all the workstations from both site could be reachable.
Do you have an idea ?