What do these (vgauth and caf) do exactly? We recently upgraded to ESXi 6.0 and when I update VMware Tools on a Linux VM I am asked "Do you want to enable Guest Authentication (vgauth)? Enabling vgauth is needed if you want to enable Common Agent (caf). [yes]" I don't recall being asked this in the past. Not being sure what this is I answered no and the install completed successfully. By not installing what functionality will I be missing? I've Googled for information but can find no explanation of what the "Common Agent" is or does.
Thanks