3.1.5.9 WDS_OP_RESET_BOOT_PROGRAM
The WDS_OP_RESET_BOOT_PROGRAM opcode is used by the client to notify the server that the deployment is complete, and the server SHOULD therefore reset the PXE boot program selected for the client, if appropriate per server policy, so that the client will not attempt to boot from the network after the client next reboots.
The server MUST validate that the client has specified all required variables.
The server MUST use the CLIENT_MAC and CLIENT_GUID variables to locate the Computer Object in the custom computer data store.
The server MUST delete the attribute in the custom computer data store that corresponds to the boot program, similar to netbootMachineFilePath in Active Directory.