[1] His father Azizur Rahman Usmani was the Grand Mufti of Darul Uloom Deoband.
[2] Usmānī began teaching at the Darul Uloom Deoband and practiced "fatwa" under the supervision of his father and later became the deputy-Mufti.
[2] In 1938, Usmāni established Nadwatul Musannifeen along with Hamid al-Ansari Ghazi, Hifzur Rahman Seoharwi and Saeed Ahmad Akbarabadi.
[3] Usmānī was a close associate of Hifzur Rahman Seoharwi and served as the working president of Jamiat Ulama-e-Hind after the death of Ahmad Saeed Dehlvi.
[4] He disassociated himself from the Jamiat Ulama-e-Hind in 1963 and a year later, in 1964, he co-founded the All India Muslim Majlis-e-Mushawarat[4] and became its president after Syed Mahmud.