I have installed five ESXi 6.0 and 1 instance vCenter 6.0.
I have one license for vCenter 6.0 "vCenter Server 6 Sandart"
I have one license for ESXi 6.0 "vSphere 6 Enterprise Plus" for 2 CPU
When I add first host to vCenter I select license "vSphere 6 Enterprise Plus", then I add second host and I get this masage "The license capacitys unsufficient" because capasity 2 CPU and used 2 CPU.
This License only for one ESXi server?
Since vSphere Enterprise Plus 6.0 license is for 2 CPU you can only add a 01 (one) host with two physical CPU or 02 (two) hosts with a single physical CPU.
If the host you added have two physical CPU, then you will need additional licenses to be able to add more hosts.