All file-based integrations create an entry in the integration log. Here you find a list of all integration jobs, failed as well as succeeded.
Click Administration in the left-hand menu and then Integration log to find it.
In the Status drop-down menu, you can filter the logs by status (Warning, Failures, Completed).
In the Log types drop-down menu, you can filter for type of entry (BI export, Merge contacts, and so on).
In the From date and To date selectors, you can filter log entries by date.
Select Update the list after changing your filters to refresh the results.
It’s possible to configure Engage to send out an email whenever an error is logged in the integration log. Read more here.