web access in ESXi

Hi every one

I am using ESXi5.1 and I need to activate web access service in my host. I found the documentation form VMware and installed vCLI on my own laptop. when I try to run the service in the vCLI interface I get the error "service is not recognized as an internal or external command"

Can anyone help me to run the web access service on my ESXi host please.

thanks and regards