As far as I understand it, concealed carry is NOT prohibited on Virginia Tech. In reviewing the CCW law, the only university that has a prohibition *in the CCW code* is Virginia Commonwealth University (VCU).
However, VT *policy* is no weapons on campus for people who have signed their contract: students and employees.
So, I can carry on campus, but students cannot. In fact, a student was disciplined last year for carrying concealed on campus (apparently not well either).
What I am not sure about is if it is a misdemeanor to carry as a student or employee while under a signed contract. I believe it is; I cannot carry at work because of my employer's policies. I think it is not different for universities.