This functionality is only available on MP, RV, GX, LS and ES devices from ALEOS firmware version 4.4.0 and onwards. M3DA password is considered as sensitive information and therefore we highly recommend to configure each of your devices with a unique password.
The mechanism to change the M3DA password is similar to the one for changing the ACEmanager password. Please refer to the procedure How to remotely change the ACEmanager password? in the paragraph above and apply it to setting ‘M3DA password’.