As of 7:30 pm, these are the 15 teams (there will be 32 total) listed on the NIVC tournament field page:
Albany
Temple
Sacramento St
College of Charleston
North Texas
Bowling Green
Maryland Eastern Shore
Wyoming
Bryant
SIUE
Stephen F Austin
Oral Roberts
Texas St
Alabama A & M
Pacific
Ohio St and Dayton have probably been invited, but either declined or have not decided.