Stop the Sales Orders flow between R/3 and CRM systems.

Hello Experts,

I am facing one middleware related issue.

I am creating a quotation and Order in Crm system an those are replicated to R/3.

But I am creating some orders in r/3 and those are alos replicating to CRM, I want to stop the flow of Orders between R/3 and CRM.

Please let me know where I have to do the changes.

Thanks