I thought this was a very known issue but assumptions are the mother of all …. So here some (old news). When deploying a virtual machine from a template within vCenter while using customization specification and within the customization specification it indicates that the system should be placed in a particular domain. Sysprep will try but is not able to do this.
Was once an enthusiastic PepperByte employee but is now working elsewhere. His blogs are still valuable to us and we hope to you too.