Admiral Baldwin was a Starfleet officer who notified Jean-Luc Picard of the Diagoran fever epidemic which hit Oriens Alpha IV. He also warned Picard about the high amount of Romulan activity along the Neutral Zone.
Worried that the USS Enterprise-D did not arrive in time, Baldwin hailed the ship, and Picard told him about the contact with the derelict Eunacian ship and their mentioning the Ifd, which Baldwin said he would investigate.
It was not long after delivery of the medical supplies when Baldwin again contacted the Enterprise, this time about a distress call from the mining moon of Oriens Gamma IIIB. (TNG video games: Future's Past, Echoes From the Past)