Happened at an ex-employer's where they were prying on people's chats, emails, whatever accounts they were logged into while connected to their network without them knowing, and using what they found for office politics. From what I found and had confirmed from someone in IT, at a minimum at least one manager was using mitm software, IT had sslstrip on network traffic (I know there's a real security use for it but they also used it to pry), managers requested IT to let them read other people's emails, and managers had logs of chats (not sure if that was feature for admins/paid subscribers). Also happened at a well known company someone I know worked at, where they monitored and fired people over what they wrote in chats.

Careful with what you type if they're paying for the software, devices, and/or your traffic is routed through their network.