When you need to add new client for your FulfillmentApp account go to
1. FulfillmentApp / Settings / Merchants
Click on button "+ New record" and follow steps
Enter company data ( clients)
and click on Next
Enter user data (user for clients account and fulfillment user for accessing clients account for setup additional details.
click on Next
Choose options for warehouse - if client uses lot, exp.date or/ and serial numbers.
Choose courier / delivery service which will be used for delivering clients orders
after clicking Next you will see summary of created account and clients account is ready to use.