Oh no.

He's doing the configuration and SIEM management from the domain controller.

He is -logged in- to the domain controller and is doing the configuration of the SIEM system -from- the UI of the domain controller.

Oh dear.

The SIEM is running via Hyper-V....ON THE DOMAIN CONTROLLER

The DC is running bare-metal, and is hosting Hyper-V instances beneath it.

How is that configuration even -allowed-?