Existing leads are not being updated. We have added a field for each lead called trainingplanURL and are pulling this into the nurture emails via a token. That is being done correctly. Any new leads entered into Marketo via the API are getting that custom URL (training plan URL) added to their record. However, existing leads are not getting that added. The vendor has looked through the API documentation and cannot find anything to solve this type of issue. Here is some additional information from our vendor: The form is adding leads via the REST API, using the /rest/v1/leads/push.json endpoint to add the lead, and the /rest/v1/lists/{listId}/leads.json endpoint to add the lead to a list.
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