@Ramessh Kanna We (Enterprise Analytics) has implemented e-invoicing directly with other vendors. There are several ways depending on the flexibility of the e-invoice solution provider in your other end. Some vendors provide the flexibility of reading and sending the messages based on standard IFS messages. But, sometimes you need to modify the standard messages. Please feel free to talk to us for more info.

Thank You so much Eranda, I will Contact you and get some advice regarding the Implementation