HOW TO: BOOT VMware vSphere Hypervisor 7.0 (ESXi 7.0 ARM) from an iSCSI LUN for the Raspberry Pi 4, Step by Step Tutorial with screenshots. Setting up the Synology SAN to allow the Raspberry Pi 4 to BOOT ESXi 7.0 ARM edition.
Microsoft has ended support for Windows Server 2012R2. This means not only an end to features and bug fixes, but an end to security patches as well. Rather than building a new server from scratch, there is the option for an in-place upgrade.