The CLUSCTL_NODE_SET_PRIVATE_PROPERTIES node control code stores the unknown properties (section 188.8.131.52) for the designated node as part of the node's non-volatile cluster state.
The unknown properties of a node are the part of the node's non-volatile configuration data that is maintained in the cluster state and whose schema is defined by an entity external to the cluster.
The client MUST provide one or more unknown property names and their associated values, by using the format specified in section 184.108.40.206, in the buffer that is designated by lpInBuffer.
After successful completion of the method, the server SHOULD NOT write any data to the buffer that is designated by lpOutBuffer.
The server MUST accept a CLUSCTL_NODE_SET_PRIVATE_PROPERTIES node control code request if its protocol server state is in the read/write state, as specified in section 3.1.1.