The 23-year-old spent last season on loan at Ipswich Town, where he scored twice in 17 appearances. Now, Williams is on the lookout for a new club after United confirmed his departure, releasing a statement thanking the youth team graduate.
The United statement read: "Brandon Williams is to leave Manchester United at the end of the contract, with best wishes from everybody at the club."
The announcement then ended with the club wishing the young Mancunian all the best: "Brandon will always be welcome back at the club, through our Academy's successful Alumni programme, and we would like to wish him the very best of luck for the future."