Read-only access to APIs prevents automated, third-party backup solutions (like Veeam) from working natively.

vSphere HA provides uniform, cost-effective failover protection against hardware and operating system outages within a virtualized environment.

Whether you want to move to an or a cloud alternative Your current vCenter management status

If you have a legitimate 25-digit license key, follow these steps to apply it to an ESXi 5.5 host: Using the vSphere Client (Desktop App) to your ESXi host using the vSphere Client. Select the Configuration tab.

It is highly discouraged to look for "free license keys" or "keygens" for ESXi 5.5.