By VMware client, I actually meant Vsphere. Part of my job is managing the several hundred virtual servers that run a state wide law enforcement agency. VMWare hasn't updated their thick client to support all of the features in ESXi 5.5. To access those features and have passthrough authentication, you have to use Flash, and a windows based browser. Perhap the position you've chosen to take works for you, but If your only experience with VMWare is workstation then you're hardly an authority.