Ole Miss didn't care, just win, and don't get caught.If he is calling from the plane and doing it in a hotel room paid for by the school then he has gone over the line.
Even if paying for it out of his own money it is a criminal act arraigned and conducted during time he was representing the school and if in his hotel room in a location paid for by the school.
In the private sector he might be able to make an argument but when you work for the taxpayer you get tried in the court of public opinion.
But I don't understand the hotel room concern. They were paying for him to stay there whether he solicited a hooker or whacked off !