Using vSphere 5.5U2 Client to edit the settings of virtual machines of version 10 or higher

With vSphere 5.5 Update 2, you have the ability to edit a Virtual Hardware 10 VM using the vSphere Client (a.k.a C# or thick client). You are able to edit hardware version 9 and 10 VMs, but only on the feature level of hardware version 8.

Now, the KB is updated with this information. Check out KB 2061336 

Here are the list of properties that are editable

• Increase RAM
• Decrease RAM
• Change network port group
• Remove devices
• Increase vCPU
• Decrease vCPU
• Mount ISO
• Increase disk space
• Set a limit
• Remove a limit
• Set a reservation
• Remove a reservation
• Edit advanced settings

Editing of virtual machine 10 features from vSphere Client viz AHCI for SATA support(Advanced Host Controller Interface) or SATA as controller supported on CD-rom or Virtual disk are not supported. Such change to devices will have to be done through vSphere Web Client only.

Get vCenter 5.5 Update 2 at download page

Source:-
http://blogs.vmware.com/vsphere/2014/09/using-vsphere-5-5u2-client-edit-settings-virtual-machines-version-10-higher.html?src=vmw_so_vex_ragga_1012