The year 1763 and the following years marked the beginning of a long period of association of the al-Dahdah family with the Shihab emirs of Mount of Lebanon. Through the good offices of Mansur al-Dahdah, Emir Yusuf Shihab had received the annual iltizam of the Northern Mount Lebanon districts, which the Ottoman Pashas of Tripoli had previously awarded to different members of the Hamadah clan, and he put members of the al-Dahdah family in charge of administering and collecting imperial taxes from these districts. In 1763, Shaykh Mansur al-Dahdah was put in charge of administering the people and revenues of the Byblos District, a position which was later passed on to his son Hanna and his grandsons Lwis and Jahjah after that; his brother Shaykh Wuhbah al-Dahdah was put in charge of Jubbat al-Munaytra, the former stronghold of the Hamadah Shaykhs. Shaykh Mansur al-Dahdah also received large estates in the Byblos and the Futuh districts, as compensation for the sale of his properties to guarantee the Hamadah obligations under their iltizam.