The last time we tried this we had am important issue it turns out that you cannot install Zimbra from Vsphere client - the bits of the install that allowed me to specify a fixed IP etc we not there on our system - the Vsphere support team they say ....

"I can confirm that I am unable to deploy the ZCA from the OVF Template when the vSphere client is connected directly to the vSphere host. My recommendation is to use vCenter server to deploy the ZCA. Unfortunately, I do not have a workaround for you."

Does this still apply does anyone know?