VMware Cloud Director Availability new replication fails at 74% with "Operation Aborted Due To An Unknown Error"

Products

• VMware Cloud Director
• VMware Cloud Director Availability - Disaster Recovery 4.x
• VMware Cloud Director Availability - Migration 4.x

Issue/Introduction

When creating a new cloud-to-cloud encrypted protection the replication fails in VMware Cloud Director Availability with:
Operation Aborted Due To An Unknown Error

When examining the replicator.log on the destination replicator the error is shown:
2026-02-06 16:25:43.494 ERROR - [###########################] [#########] c.v.h.r.monitoring.host.NfcHostEnabler   : Failed to push crypto keys to hosts mounted to [datastore-########] in ################
com.vmware.vim.binding.vmodl.fault.HostCommunication: An error occurred while communicating with the remote host.
...
2026-02-06 16:25:43.498 ERROR - [UI-#####################################] [job-38] com.vmware.h4.jobengine.JobExecution     : Task ########################## (WorkflowInfo{type='setupDestination', resourceType='replication', resourceId='H4-#####################', isPrivate=false, resourceName='null'}) has failed
com.vmware.vim.binding.vmodl.fault.HostCommunication: An error occurred while communicating with the remote host.

Environment

VMware Cloud Director Availability 4.7.4

Cause

The key provider is not the same on the destination site as the source site for replications. 

Resolution

Verify that the key provider is the same for the organizations on both source and destination. This is a requirement from Create a replication for encrypted virtual machines. After ensuring the key provider is the same on each side the replication will complete.