Unauthorized keys may work initially but can be invalidated by VMware during routine updates or check-ins, leading to host disconnection or VM failures.
Thankfully, with the 2025 return of the official free ESXi hypervisor, most users no longer need to resort to such measures. The official free edition is robust enough for learning, testing, and running a capable home lab. For those seeking a more complete enterprise feature set, the VMUG Advantage program provides a legal and affordable route. esxi license key github
Disclaimer: This article is for informational purposes only. Using unlicensed or unauthorized software keys is a violation of the VMware EULA. Unauthorized keys may work initially but can be