We are seeing the following when trying to commence replication on 2012 R2 Hyper-V boxes

Hyper-V failed to enable replication
Hyper-V is not ins a state to accept replication for virtual machine
Operation aborted (0x80004004)

Hyper-V could not replicate changes for virtual machine as Hyper-V is not in a state to accept replication on the replica server.

Log Name: Microsoft-Windows-Hyper-V-VMMS-Admin
Source: Microsoft-Windows-Hyper-V-VMMS
Date: 22/06/2017 11:59:29
Event ID: 32000
Task Category: None
Level: Error
Keywords:
User: SYSTEM
Computer: server.domain.suffix
Description:
Hyper-V failed to enable replication for virtual machine 'T2M-DC4': Operation aborted (0x80004004). (Virtual machine ID 6DD15EEA-228A-4F26-ABC9-4BCAD1D1A40F)
Event Xml:



32000
0
2
0
0
0x8000000000000000

2807


Microsoft-Windows-Hyper-V-VMMS-Admin
server.domain.suffix




VM
6DD15EEA-228A-4F26-ABC9-4BCAD1D1A40F
%%2147500036
0x80004004

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In our case this was machines with duplicate IDs or names being live already on the destination replicating partner.

We had to copy the VM and register a new computer machine ID and then redo the replication in order for the VM ID to be accepted on the destination host machine.

We just copied the VHDX files so that the VM remained the same system in practice.

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