The important fields are the Authorization information in the ISA section. Use the username and password supplied by Navicure. (Go to Tools > Program Setup > Patient Eligibility for additional set up)
EDI Connection Library for Claims and Reports
User Login & Password Provided by Navicure
Host Name = secureftp.navicure.com
Port = 22
Upload file: IN
Download file: OUT/ (835, 277, etc)