The database passwords are directly managed from ArchivistaBox. That is why all the normal passwords can be administrated directly in WebAdmin, see also 10.
Nevertheless, there are two user accounts which cannot be stored in the databases. For one it is the 'root' account (owns all rights) and for another it is the archivista user account (ArchivistaBox runs under this account). You can define the passwords for both users here. Furthermore, all user accounts for WebAdmin and WebDMS can be reset. You as Administrator will need this latter function when users have forgotten their passwords.
Warning: Setting these passwords incorrectly or forgetting them makes any future access to ArchivistaBox impossible. Be therefore extra careful when composing these passwords.