Thanks @Hanu pydimarri for the detail.
For 837 message types, you need to perform a few extra steps and those are listed in below MS docs,
I would suggest you to check the below document,
Regards,
Kamlesh Kumar
BizTalk Techie
Please don't forget to click on or upvote button whenever the information provided helps you. Original posters help the community find answers faster by identifying the correct answer. Here is How
Want a reminder to come back and check responses? Here is how to subscribe to a Notification
If you are interested in joining the VM program and help shape the future of Q&A: Here is how you can be part of Q&A Volunteer Moderators