I installed a fresh vcenter 5 and added new vsphere 5 hosts.
Now if I create a virtual machine and afterwards edit the virtual machine settings, I get an Error:
The Server fault 'InvalidArgument' had no message. But the change is still done. I already tried to Remove and add the virtual machines but didnt help. It happens to all virtual machines. I dont get an error wenn I connect direktly to the Host und edit the settings there.
Only error I can find is at the windows event viewer/System Schannel #36887.