In 928 Abu'l-Musafir was invested with the government of Azerbaijan by the caliph after Abu'l-Musafir's uncle Yusuf Ibn Abi'l-Saj was killed.
After the demise of Abu'l-Musafir's uncle, Yusuf Ibn Abi'l-Saj, in 928, the caliph bestowed upon Abu'l-Musafir the governance of Azerbaijan.