The 1st International SEAF (Spacecraft Environmental Anomalies and Failures) Workshop, co-organinzed by International Association for the Advancement of Space Safety (IAASS) and the French National Space Agency (CNES), was held at Meteo-France in Toulouse (France) on 16th and 17th October 2017. The workshop was attended by 18 experts representing ten organizations from six countries. Effects from space weather, contamination, orbital debris, and micrometeoroids were the primary anomaly triggers discussed. Significant time was spent discussing identifying, resolving, attributing, and operating through anomalous events. The participants agreed on several key points. In particular that the lack of knowledge of space physics, detailed understanding of spacecraft on-orbit, and the nominal effect of each trigger has a significant amount of uncertainty which combine to complicate anomaly attribution.