Yazid ibn al-Muhallab
In 706 or a few years later he was appointed as governor of Basra under the governor of Iraq, al-Hajjaj ibn Yusuf, and remained in the post until al-Hajjaj's replacement by Yazid ibn al-Muhallab in 715. Yazid in turn named al-Jarrah as his deputy for Iraq, before he himself left for Khurasan, and in 717, Caliph Umar II (r. 717–720) appointed al-Jarrah as Yazid's successor in the governorship of Khurasan and Sistan. Al-Jarrah remained in Khurasan until March/April 719, when he was dismissed after 17 months in office due to complaints of his mistreatment of the native converts to Islam ("mawali"), who, despite their conversion, were still obliged to pay the poll-tax ("jizya"). He was replaced by his deputy, Abd al-Rahman ibn Nu'aym al-Ghamidi. The most notable event of his tenure was the beginning of the covert missionary activity ("da'wah") by the agents of the Abbasids in Khurasan. After his return to Iraq, in 720, he seems to have fought alongside Maslamah ibn Abd al-Malik in the suppression of the rebellion of Yazid ibn al-Muhallab.