Citrix Xenserver 7.2 Iso Download ((hot)) Link

Kernel: Linux 4.4
Dom0 RAM: 8 GB default (4 GB minimum)
Supported Guests: Windows 10, Windows Server 2016, various Linux distros (older versions)

Test the boot media on a non-production machine first.

Searching for the Citrix XenServer 7.2 ISO can be a bit of a nostalgia trip, as the platform has since transitioned into Citrix Hypervisor