I want to deduplicate a list of people in Marketo using the SFDC Account ID. This isn't possible using the Marketo Duplicate Fields filter. Does anyone know of a good workaround?
Export to spreadsheet, dedupe, and reimport is going to be the sanest approach. (I'm assuming you aren't/don't have a developer, though for a one-off the API isn't much better here.)
This wasn't the answer I was hoping for.I was looking for a solution within Marketo.
Sorry, not possible.
If you wanted to get close-to-crazy I suppose you could  create a custom String field,  copy the First Name to that field using Change Data Value,  copy the Account ID to the First Name,  dedupe on First Name,  set everything back.
Retrieving data ...