The more secure and less error-prone method is to build new ESXi hosts on a supported version (8.0 is the current release) and migrate your workloads.
How to Identify VMware Version and License Key - licenseware
Use the vim-cmd command: vim-cmd vimsvc/license/set_license LICENSE_KEY Why You Should Upgrade from ESXi 5.5 Operating on ESXi 5.5 in 2026 presents significant risks. vmware esxi 55 license key 14k
Released around 2013-2014, vSphere 5.5 (which includes ESXi 5.5) brought significant improvements to virtualization scalability.
: Allows virtual machines to have up to 8 virtual CPUs (vCPUs). The more secure and less error-prone method is
VMware ESXi operates on a per-processor (CPU) licensing model. A single license key is required for each physical CPU installed in the host server, up to a specific core limitation depending on the tier. The 60-Day Evaluation Mode
Searching for public license keys or key generators online exposes your infrastructure to severe risks: : Allows virtual machines to have up to
What are running on these virtual machines?
– VMware officially ended support for ESXi 5.5 on September 19, 2018. Using it today poses significant security and compatibility risks.
All modern VMware license keys are managed through . No third-party reseller can generate a valid license key – they only resell official VMware-issued keys.