VMware vCenter Server 7 standard - Lifetime 1 Device (Global)

vCenter Server provides centralized, unified management for the objects in vSphere environments like hosts and VMs. It is a requirement for a complete vSphere deployment. vCenter Server Standard – Highly scalable management with rapid provisioning, monitoring, orchestration, and control of all VMs in a vSphere environment.

Download the software from the Official Site.
Login to your root.
Go to Manage -> License
Enter the key.