I use Bitwarden with a Vaultwarden server so I have some familiarity. Bitwarden checks new passwords against HiBP. I'm not aware of functionality where it can retroactively check old email addresses or passwords to see if they're included in a breach.
Ahh, okay. I assume that's a part of the Bitwarden offering, presumably happening server-side. I'm just using their official client w/ a Vaultwarden server.
