Explains how backfills work for the Marketo Connector app.

Marketo Connector Backfills

You can run a backfill in Marketo by going to any of the 3 Marketo Setup Instructions (regardless of the registration form used) and searching on “Backfill in Marketo.” Backfills need to be run one month at a time. This solution is API based, which means the data can be pulled as far back as your ON24 contract activation date. 

If you are an Advanced Analytics customer, please see What is a Backfill for an alternative approach at obtaining historical data.