I agree completely that sexual harassment is a minefield that's too easily abused. And of course without more details it'd be impossible to ever know the truth, but something about the circumstances as they're being reported has me leaning towards him being a slime-ball rather than her crying wolf.
-Eóin
That's funny- I'm leaning towards him having been interested in the past, but this being an innocent incident that made her think that he didn't get the hint. Especially from (1) the part about her 'giving him the benefit of the doubt' before, (2) the fact that the university didn't truly cite him, and (3) the fact that they didn't say anything about colleagues speaking up that he didn't show them the same article.
I think the uni is in CYA mode. He made a possible misstep before, and they see that. They also see that this incident doesn't stand up as sexual harassment. So they send him to some training class and put him under watch to satisfy her without censuring him so that neither side really has a foot to stand on.