It’s probably a google search away, but if I’ve typed it slack/outlook/whatever, but not sent it because I then thought better of it, did the app still record it somewhere? I’m almost sure it has to be and I would like to apologize in advance to my senior leadership…

That depends greatly on your tooling, your company, as well as the skills and ethics of your Enterprise IT team.

Generally speaking, it’s in ours’ and the company’s best interests to keep as little data as possible for two big reasons: legal discovery and cost. Unless we’re explicitly required to retain historical records, it’s a legal and fiscal risk to keep excess data around.

That said, there are situations where your input is captured and stored regardless of whether it’s sent. As you said, whether it does or not is often a simple search away.

As someone who was once asked under oath "What did you mean when you sent the email describing the meeting as a 'complete clusterfuck'?" I can attest to the wisdom of those words.