One Time Consumer - CRM / ECC

Hi,

I'm working with SAP CRM 7.0 (Service Scenario)

I have created Consumers in CRM and I don't want to replicate them in ECC.

How can I use the One Time Consumer in ECC in order to be able to replicate the BPs data "on demand" when replicating the CRM transactions (ex Sales Orders) in ECC?

Can anybody provide me with some documentation or explanation?

Thanks and Regards,

Andrea