In 2017, Aiesh managed to win his first major trophy, the 2017 Svenska Cupen, after Östersunds defeated IFK Norrköping 4–1 in the final, as a result of the victory, also qualifying for the 2017–18 UEFA Europa League, marking their first appearance in a European competition tournament. In their Europa League debut in the second qualifying round on 13 July 2017. Östersunds earned a shock 2–0 victory against Turkish giants Galatasaray at the Jämtkraft Arena and eliminated them after a 1–1 draw in Istanbul.