Dear Marco,
Just completing last information provides. After activate you'll need to maintain copy control.
Go to SPRO
Customer Relationship Management
Transactions
Basic Settings
Copying Control for Business Transactions
Define Copying Control for Transaction Types
Check out these notes:
Note 1236015 - ERP Sales Documents in SAP CRM
Note 1078575 - ERP sales transactions in SAP CRM
Regards,
Caíque