How do I get a DDCSN ID and password? Employees Employees can signup for Extranet IDs on the Employee Extranet Signup pages. This process will require you to enter your Detroit Diesel email address. This email address will be used to send you new Extranet ID and password. DDC Affiliated Companies Detroit Diesel's distributors, dealers, suppliers and customers can signup for Extranet IDs by completing an Extranet Subscription Agreement. This agreement will require your Detroit Diesel 5 or 10 digit company code. You will fill out a couple pages of information, print the pages, sign them, and fax them to the appropriate Detroit Diesel Representative.