Conference USA issued a statement acknowledging Old Dominion, Southern Miss and Marshall will leave the league for the Sun Belt effective at the end of this spring season.
C-USA had previously vowed legal action to force the three schools to remain in the conference through next season, and last month both C-USA and the Sun Belt released contradictory football schedules with those three teams on it.
C-USA has not announced a time frame for a revised football schedule.
"Conference USA, Marshall University, Old Dominion University, and the University of Southern Mississippi have reached a resolution that allows the schools to withdraw as members at the end of the academic year," C-USA said in a statement released at 5:33 p.