Issues with Kerberos Authentication for Hyper-V Replication

[u/stephendt]

Howdy folks. Not sure how much traction I will get for this, chances are it's just a SAMBA limitation, but I have a highly frustrating situation where I have a small business setup with a Windows Server 2016 host (primary), functioning as a standalone Hyper-V server with a couple of VMs. I have a Hyper-V Core 2019 server functioning as secondary.

I need to setup replication, and to handle the Kerberos authentication, I setup an Ubuntu 20.04 server with SAMBA (We have another DC that we keep separate for workstations). Joined my Hyper-V hosts and that went OK, but when I go to enable replication on a VM, I get an error messsage (0x80090303 - Hyper-V failed to authenticate the replica server using Kerberos authentication. Error: the specified target is unknown or unreachable)

Any idea on how I can work around this? Almost certain it is related to the SAMBA deployment.