The VMware Labs engineers built a fling to migrate a vCenter Server installed on a Windows Server to the vCenter Server Appliance.
For me the greatest limitation is that Windows Server 2012 a higher isn’t supported yet. Because of “winexe-bug” the migration appliance could not get the data from the source machine. William Lam told me that the engineers know about this issue and hopes that it would be fixed soon.
For all of you who could not wait… maybe I’ve a workaround.