On November 19, 2021, the Air Traffic Management Exploration’s (ATM-X) Project’s Urban Air Mobility (UAM) Sub-Project successfully completed another step towards developing a Provider of Services (PSU) for UAM, and also led seven airspace partners in developing their PSU for the National Campaign 1 (NC-1). All seven partners (ANRA, Avision, Collins, Metron/Airbus, OneSky, SkyGrid, and Unmanned Experts) together with NASA, conducted Operational Intent exchange tests and connected to the Discovery and Synchronization Service (DSS). Participants were able to submit an operational intent to the DSS, discover other PSUs in the area of their operational intent, and distribute the operational intent to those PSUs. This is the second Sprint test in a series of Provider of Services simulation tests aimed at preparing the airspace partners and the NASA PSU for inclusion in NC-1. Sprint #3 exercises a nominal flight scenario and is currently underway with an expected end date of December 17, 2021. The series of sprints within the scenarios are used to validate features that will be used in a collaborative scenario simulation with the partners, planned to run from March to June 2022.