Update old previously sent Receivables Transaction Delivery Method and Print Date to XML

Hi

We are going to be using Collaboration Messaging to deliver XML invoices to a Service provider however a question came up for what happens to previous/historical transactions. We were using a custom process meaning that transactions were not printed by the Print Receivables program. Therefore all transactions would be considered as 'New' when running the scheduled process for XML - 'Generate and Transfer XML Transactions'.

Using the API we discovered we could update the Delivery Method to Paper, Email, Custom but not to XML and add a printed date.

What is the recommendation to bulk update our transactions before we start using Collaboration Messaging for XML delivery method to avoid generating XML's for invoices previously issued and sent invoices?