Law is not working like that. We are talking about antitrust laws which have specific criterias to evaluate if a company is dominant on a market and is abusing

Law is not working like that. We are talking about antitrust laws which have specific criterias to evaluate if a company is dominant on a market and is abusing this position or not. All these criterias must be evaluated for each case. There are many steps involved: - identifying the relevant markets, probably something like office applications market and chat applications market. - whether the company has a dominant position on one (likely MS being dominant on the office apps market) - checking if a specific action could be considered as a abuse of dominant position, restricting the competition. Here it would be MS bundling the app, giving them an unfair advantage on the chat apps market. They would likely be to assess the real damages to the market, whether or not competitors were able to do business or not, etc. It's not all black or white, like any legal subject.