He literally did not. He outright informed her in the letter proposing the Gathering that she should not mistake it for an offer of peace. On top of that not only did he not punish Genn - despite the fact that earlier in the book he admitted that Genn not only was in the wrong in Stormheim but also that he broke his orders to commit that wrong - but he then brought him to the Gathering to parade his unpunished ass in front of Sylvanas as if he had no other advisers to choose. Finally, he was negligent in his obligation to vet the people he brought and let a pretender to Sylvanas' throne slip into the Gathering.