3.3.5.8.5 Sending a RopSynchronizationGetTransferState ROP Request
Clients are only required to use the RopSynchronizationGetTransferState ROP (section 2.2.3.2.3.1) when performing synchronization uploads, as it is the only way to obtain the ICS state maintained on the synchronization upload context.
For details about the client behavior when receiving a response to this ROP, see section 3.3.5.9.