Product : Microsoft, Windows Server/Hyper-V replica, 2012R2
Feature : Multi-site support, General, Architecture
Content Owner:  Viktor van den Berg
1:1, 1:N, N:1 and N:N topologies are supported.
With extended replication your replica server forwards changes that occur on the primary virtual machine to a third server. After a planned or unplanned failover from the primary server to the Replica server, the extended Replica server provides further business continuity protection.