[ziddoap]

Well... Yeah. I didn't intend to imply that it will never be a feature (it might already be in higher tiers), and I never intended to imply anything about Slack's data retention.

I was just stating that at the moment, at my tier, I am unable to see private messages.

[GauntletWizard]

Your employer can always change your password and then login as you to read your private messages. It leaves behind a trace (you've gotta reset your password afterwards, they can't restore your old one), but it's a "workaround".