Baba Farid appointed Sheikh Nizam-ud-din Auliya (1238 - 1325) as his Khalifah. It was Nizam-ud-din Auliya who trained a group of Sufis for the propagation of Islam in Gujarat, the Deccan and Bengal. Earlier, Sheikh Ali Hajweri, popularly known as Data Ganj Baksh, came from Ghazni to Lahore a few days after the death of Sultan Mahmud. He is mainly responsible for the propagation of Islam in Punjab. The disciple of Sheikh Baha-ud-din Zakariya, Syed Jalal-ud-din Bukhari, popularly known as Mukhdum Jahanian Jahangasht, was one of the most important saints of the Suhrawardiyah order.

He played an important part in the propagation of Islam in Sindh. Shah Jalal came from Turkey and was a great Suhrawardi saint of Bengal. He came to the Sub-continent in the reign of Iltutmush. Due to his missionary activities, Islam gained good ground in Sylhet. Sheikh Ala-ul-Haq and his son Nur Qutb Alam established new orders after their names in Bengal, and are responsible for large-scale conversions in Sylhet, Bengal.