Answer:
(Fatwa: 1411/1180=L/1429)
The Mehdavis are out of Islam, any Muslim girl can not marry a Mehdavi boy. If there is such pair in relation, they must be separated; such a Nikah is not valid as per the Shariah.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
