Error in ReliableDR replication jobs when virtual hardware version is lower than 7.0.
Changed Block Tracking (CBT) is a VMware feature that helps perform incremental backups. ReliableDR uses this technology which is available on ESX/ESXi 4.0 or later.
Mostly of the times, when you get the Exception creating the VM MailFilter.replica. Message: A specified parameter was not correct. spec.changeTrackingEnabled error, what is happening is that the VM to replicate has a lower virtual hardware version than 7.0. So please, find a gap to shut down the VM , upgrade the virtual hardware version, power on the VM, and try again.