In the campaign of 1799, Wolff participated in the battles at Ostrach and Stockach as part of the advance guard of Archduke Charles' army. In late May, he held a group reserve of over 3,000 troops in the Valtelline, on the Lombard border with Switzerland, where he supported Gottfried Strauch's suppression of the Cisalpine revolutionaries. By June he was in northern Italy, with Konrad Valentin von Kaim's Turin division, where he commanded a mixed brigade of infantry, dragoons and grenadiers at the Alessandria garrison. Later that year he commanded a corps of the grenadiers Bellegarde in Switzerland, participating in the Swiss counter-revolution against the French in the Engadin valley. In 1800, he also participated in the Battle of Marengo, commanding the Archduke Josef Infantry Regiment (No. 63), again as part of Kaim's division.