Hello Andres,
We had a similar requirement for one of our Customers who had integration to CRM OnPremise.
They did not wanted users to Create or Change Accounts, but only Prospects.
We used SDK fro that where in we had set the Properties for the Prospect:
1. Make Prospect Flag READ-ONLY & Checked, so that ONLY Prospect creation is permitted.
2. Make the Header & other available items for the Account Object READ-ONLY, this would not allow any user to make changes to the Accounts.
There is a little Custom work involved here of creation of your solution & using the extesnsibility explorer to enhance this.
[Generally, Customers would not like Master data to be flowing back from Cloud to ECC/CRM OnPremise to maintain consistency of Master data, for this case which I have mentioned above, for Accounts, it was a unidirectional integration flow of accounts from CRM OnPremise to Cloud.]
Hope this gives you some direction.
BR
Ankur
Message was edited by: Ankur Godre