> Depending on where you work, there’s a significant chance that artificial intelligence is analyzing your messages on Slack, Microsoft Teams, Zoom and other popular apps.

I don't think it's so unclear, and it sounds like you understand too, internal comms. I know it seems obvious, but a lot of people wouldn't even immediately guess. (My first guess before RTA was Slack or anything like Slack. I always think, when I use Slack, that it cannot be truly private unless I start manually encrypting my messages with coworkers.)

I'd guess anything that the business has control over might be a candidate. Even easier if the platform allows for apps to be added on at the company level.