IANAL (Mr Roberts answer is probably more appropriate) but I spent 5 years working for a subsidiary of an American company and had many meetings like this. I'm

IANAL (Mr Roberts answer is probably more appropriate) but I spent 5 years working for a subsidiary of an American company and had many meetings like this. I'm also a Canadian, living in Canada. At the border, you say that you are attending meetings and receiving training. You are not giving training or leading meetings. It was never a problem given I said those words. Edit: again, Mr. Roberts answer is probably more accurate, and YMMV