I don't really know what exactly the diference is, but it's the following option inside veeam backup & replication 9 GUI:
Menu --> Options --> E-Mail Settings
I attached a screenshot-link of the e-mail notrification.
As you can see, in the Backup-Job-Name the machine is named as it should (P-P-PC-01), but below you see, that the machine still is showed with its old name (KMG). I tried to re-install the Endpoint-Backup-Software on the physical machine but that did not help.