@ShyMae @ShangY @Jeff_S @Nicole_N 
Can you please address some of these questions in this thread? Here are some:
1. Can it ship multiple packages?
2. Can we use our customers' accounts?

3. Can we use OUR negotiated rates and not ShipEngine's rates?

Please, please, PLEASE just either answer the questions or say you don't know. None of us here need additional links. None of us are getting any information through the QB help method.