If a Virtual Machine's MoRef is changed due to migration to a new vCenter / inventory change in vCenter, you will receive the error "Object "vmname" is not found". Please see KB1299
for more details.
This utility is designed to assist in re-mapping the MoRef IDs of the Virtual Machines you are backing up and/or replicating using Veeam Backup & Replication, so that backup incremental chains remain intact after an inventory change in VMware vSphere vCenter. Do not run any jobs before using the migration tool; otherwise, the migration process won't be possible.