vCenter can execute approximately 640 concurrent operations before incoming requests are queued, and can support up to 2,000 concurrent sessions1. VMware Horizon 8 can support up to 120,000 active sessions in a Cloud Pod Architecture pod federation23. Therefore, if the environment has 10,000 virtual desktops, one vCenter instance might not be enough to handle all the operations and sessions efficiently. The recommended number of vCenter instances in this configuration is B (2).