We are using ECC sales order functionality and REx 3.1 and REx3.3.Currently we are using standard print feature(/MRE/RST_SALES_ORDER_TRANSFORM) to print or email sales order details in REx.We need to display delivery date instead of created date using this standard template in REx .We have gone through REx 3.1 admin guide and found 2 ways to do:
1. Create a custom template and maintain in MIME repository and maintain its path in SPRO settings in "Print Settings".
2. Badi implementation.
Is it possible to achieve the same through custom devlopement on REx front end?
Please suggest the best possible approach to do the same.