However, when I try to configure DTLS and DIGSI4 connection passwords by following document C53000-G1140-C167-17 the Web menus for configuring (/setmaintenancepassword, /setupsecureengineeringaccess) do not seem present.

While I know the EN100-O is discontinued and superseded by the EN100-O+, I assumed the V04.29.01 firmware which can be used in mixed systems supports DTLS+connection passwords for the EN100-O as well.

Am I missing something or is this feature not supported?

Kind regards,