Make sure local subnets have the advertised check marked, and also, this would work as long as you have cloud VPN enabled for branch to branch (via vcg, via hub, or direct).
Make sure you have Cloud VPN enabled
If you have selected VeloCloud Hubs for Branch to Branch communication, make sure that Hubs are defined.
Make sure that tunnels from Branch to Branch is up. You can look at it by looking at List Paths under Remote Diagnostics
Also check the local routing table of each edge by going to Remote Diagnostics-- Routing Table