After battling with container data, I was finally able to get one of our files encrypted so we can become GDPR compliant.
Now, when I try to open the file on the server, it immediately fails with the error:
Error 939 "Database could not be opened: incorrect encryption password."
The server never even prompted me for the encryption password.
I did a consistency check on the file, which passed. Also tried recovering the file, but no errors were found.