What’s new in Hyper-V Replica in Windows Server 2012 R2

Are there any good articles on replicating between two different domains?   I have tons of replication servers set up and they work great between the same domain even with an extended replication offsite to another subnet through a VPN.  I have not been able to successfully replicate using Kerberos between two different domains.   I use all the same steps I use when replicating between hosts on the same domain but no luck.

I've set up a DNS suffix on nics on both hosts and dns forwarders between the two domains and even added the subnet in active directory sites and services but no luck I still get:

3200 Hyper-V failed to enable replication for virtual machine 'Test': A connection with the server could not be established (0x00002EFD). (Virtual machine ID 71EFDF26-BD0D-4C85-81FB-6C6918AA036E)

event 29230 Hyper-V cannot connect to the specified Replica server 'HOST1'. Error: A connection with the server could not be established (0x00002EFD). Verify that the specified server is enabled as a Replica server, allows inbound connection on port '443', and supports the same authentication scheme.

Neither server has a windows firewall enabled an no add on firewall or antivirus products.   The VPN tunnel is wide open.   There is no filtering.   I have Kerberos replication enabled at both ends.   https://social.technet.microsoft.com/Forums/en-US/ad45e1be-c43c-44e4-a4df-fa8aa266fb6d/can-i-replicate-between-two-servers-in-different-domains?forum=winserverhyperv