1 of 1 people found this helpful
This probably means that the API has not be well implemented as it's only using the email address and a Unique ID. It should also use another field, "CRM ID", which value would not change when the email address is updated and would enable you to update the lead instead of creating a new one.
there is no much of a fix we can provide, as anyway the key of all solutions would be to identify the existing leads in a way that is independent from the email address
Yes, we have recommended this change be implemented using the customer account numbers. thanks for your input - I'm now going to look at implementing a CRM ID too.