The family's lands were spread throughout the empire in Le Mans, Metz, Nassau, Toulouse, Alemannia, Saxony and the Wormsgau.
[2] Adalbert is first recorded as the seneschal of Louis the Pious on 8 November 816, when he was sent as a missus dominicus (royal envoy) to hear a complaint from the abbey of Prüm against the alienation of a part of its forest by the serfs of the fisc at Thommen.
[1] In 825, he is mentioned with the title of count when again acting as a missus, this time in the legatio of Trier alongside the city's archbishop, Hetti.
[5] In 835, the emperor sent Adalbert to the abbey of Fulda to ensure that the imprisoned former archbishop Ebbo of Reims would be placed under greater security, since an attempt to free him was expected.
[8] The probable reason for this was strong opposition to the creation of a kingdom of East Francia that would have turned the Rhine into a border, since the Hattonians held lands on both sides of the river.
[12] Adalbert attended the assembly at Nijmegen in June 838, when Louis the Pious made his eldest son, Lothar I, guardian of his younges, Charles the Bald.
[11] Adalber attended Charles's coronation as king of Neustria in September 838, where it was also announced that Louis the German's kingdom would be limited to Bavaria.
[14] In January 840, the emperor, then in Aquitaine, ordered Adalbert and Bishop Drogo of Metz to defend the Rhine and prevent Louis the German from crossing until he could arrive in force.
[17] On 8 August, calling himself a "humble servant of Christ", Adalbert granted lands at Walluf and Koblenz to the abbey of Fulda "for my immeasurable sins and crimes".
[19] When Louis retreated to Bavaria, Lothar left Adalbert in charge east of the Rhine with the title, according to Nithard, of dux Austrasiorum ("commander of the Austrasians").