SAP CRM Data Exchange Toolbox offers some useful functionality for SAP CRM Order replication between R3 and CRM and also offers Sales Documents useful tools.
BDOC
SAP CRM Middleware Important Tcodes/Transactions
SAP CRM Middleware allows SAP CRM Integration to exchange Data between Different Systems.
Middleware use Business Document (BDoc) messagas.
The most used transaction for middleware is SMW01 to display Bdoc messages.