you can look at the AMT section in inventory of the machine. When a Machine has been provisioned it will show a major version. There is also a provisioned 1 or 0 in the AMT section. Using the AMT GUID would not work because that can be in inventory even if the machine is not provisioned.
Mode of operation will also change from blank to a value. Off the top of my head I cannot remember the value for SMB mode.