I've just installed an esxi 5.5 in my physical server, and then I installed the vSphere Client, I assigned the free license which I got in MyVmware -> Free Products Download - > vSphere Hypervisor.

Then I saw that I had to deploy vcenter server appliance, and I did it.

After configuring the vcenter server and the web client I saw a message box on the top of the page of the web client:  There are vCenter Server systems with expiring license keys in your inventory.

Then I went back to MyVmware portal to check if there is any license to put there, but I just found a license in the vSpere with Operations Management Product Evaluation Center, but unfortunately this license wasn't for vCenter, but to vOps.

So my question is: Is there a way to license the vCenter Server as a free version ?

Thanks !