1) It is my understanding that Marketo matches to a lead in SFDC based on email address.
2) If there are duplicates it will go to the lead in SFDC based on most recently updated.
3) So after it makes the match and there is an update made in Marketo how is the match performed? Is the same process
repeated or does Marketo store the SFDC_ID to know to go back to same same lead it matched to the first time?
4) When is the SFDC_ID field used in Marketo? It seems this could be used to ensure updates are sent to and form the same lead in SFDC?