The decision was taken at the 243rd syndicate meeting.
Baki Billah Bikul of Bangla department was demoted from associate professor to assistant professor and Shahadat Hossain Azad of English department from professor to associate professor, IU Acting Registrar SM Abdul Latif told UNB.
On July 15, 2018, four audio clips containing conversations between several candidates and the two teachers for appointing one of them at history and culture department went viral on the social media.
The next day, IU removed Azad from the post of provost of Bangabandhu Sheikh Mujibur Rahman Hall and Bikul from the post of director of Birshrestha Hamidur Rahman Auditorium.
IU also formed a three-member probe body headed by its Business Administration faculty Dean Professor Arabidu Shaha to investigate into the matter.
On October 2, the university authorities issued show case notice to Azad and Bikul.