Dolly signed a four-and-a-half-year deal with the Ligue 1 side on Monday, with the delay to the official announcement said to have been caused by Sundowns demanding full proof of payment of his 1.5 million pound transfer fee.
Dolly is already in Montpellier but has yet to have a full training session with his new side and is thus unlikely to feature in the squad for their Ligue 1 game at Marseille on Friday evening.
Download our app and read this and other great stories on the move. Available for Android and iOS.