If you have used Logger adapter to log all the data, then from the Integration Monitor you could resubmit the data. These two products are availabe from the EI Tools 4.5.2 Install and EI Adapters 4.5.2 install.
Integration Monitor helps you to look at all documents that were involved in the Integration. This way it helps you to identify the specific document/data to resubmit when failure happens.
Thus you can make sure of guaranteed delivery as well as logging.
Hope this helps.
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