To view a list of invoices that were recovered due to the Account Updater feature, download the Invoices - Summary export and use the "recovery_reason" column to filter out all recovery reasons except for account_updater. If the initial transaction failed but a subsequent one succeeded, this field indicates why.
You can read more about the Invoices - Summary export here: https://docs.recurly.com/docs/invoices-exports#section-invoices-summary