You just reminded me of the nightmare Lotus Notes was. Great idea but absolutely horrendous implementation. Probably the worst piece of software I have ever used and I have been in the industry for 21+ years now.
Ahhh Lotus Notes... in many ways ahead of its time, timeless and horribly outdated at the same time.
I still remember the crazy password screen with the symbols that changed as you typed.
If that was deterministic, that was a very bad idea.
IIRC the symbols were basically a hash of the password that let you know if you typed the password correctly without showing it.
From my time using Notes I remember lots of manual replication config to get anything to properly work offline, and even then I struggled to get it to work reliably. So while they might have solved it, I don't think their solution was very good.