I have never used Slack and don't know anything about it, so it is hard for me to say. Are Slack messages accessible by third parties? If so, that can break A/C

I have never used Slack and don't know anything about it, so it is hard for me to say. Are Slack messages accessible by third parties? If so, that can break A/C privilege. That is probably the main way it happens. You still need to be careful with email too. Just because you are emailing a lawyer doesn't make it automatically privileged, though there is a much stronger presumption and argument for privilege. But, like, your plans to go to the bar with your lawyer buddy after work are not privileged, even if they are also your corporate counsel. It still needs to be related to legal advice, or in anticipation of litigation (which itself is a very large umbrella that gets you a lot of privilege for otherwise mundane corporate communications). At any rate, a good counsellor will tell you what is safe and not safe. Be sure to take it seriously.