Hello Gregor and Benoit,
I'm assuming you mean CRM_OPPORT_H_BADI using the MERGE method.
Will this work when the Opportunity is being created as a follow-up. How are you getting the prior probability value? From the database?
I implemented a copy control badi and set the probability in the new opportunity, but the standard SPRO configuration is overwritting based on phase after the copy control.
Any ideas?
Much appreciated,
Clint