Hi @praful_patel,
So actually, NTLM Authentication is supported now in Postman! Except in Beta.
I dont have any services that I can try just now with NTLM, but I will try to see how to get it working if I can test it out some way.
As for now, refer to the screenshot to see the NTLM Authentication in Postman. Be sure you are on the latest version to see this as an option.
Hope this works!
Orest
EDIT:
I was able to test it out with a Windows Domain account, and for me, just using the username and password, I was able to get it working .