One time order item address replication to ECC

Hi,

I am facing an issue to update the one time address while creating the sales order.

The requirement is , while creating sales order from WEBUI, user should have an option to add addtional email addresses to the ship-to party for each item. We did the enhancement and the it's creating new address number and assigning it to the line item and saving all the e-mail addresses entered at line item ship-to level. But in ECC, it's taking only the first E-mail Id and other mail ids from the list are ignored.  Even if I change the order in CRM by adding new e-mail ids, it's not replicating to ECC. I am using the standard communication data email fileds, thought the standard middleware should take care of the replication process.

What should I do to replicate email ids list to ECC?

Thanks

Praveen