No, he doesn't want to reset the administrator's password, he want to reset the password on a mailbox that used to belong to the conference room.
So in this case, if it is a Merlin Mail, an 007MLM module, or a Merlin Messaging, your system administrator logs into the system administrator's mailbox, selects the option for mailboxes (or extension in Merlin Messaging), and follows the prompt to re-initalize the password. (Being sure NOT to use the prompt to re-initalize the MAILBOX, which will wipe out the messages that are in it.)
Now the password will either be reset to 1234 (early Merlin Mail) or erased and need to be re-entered then next time you log into the mailbox.
Now if you have Audix, it will need to be done from the Terminal:
If the user has forgotten the password, the administrator must reset it via the system administrator terminal because the password field does not display for security reasons.
On the AUDIX PATH type:
[ subscriber local ] and press [ Return ] to access the subscriber : local form.
[ Tab ] once, enter the mailbox extension in the 'ext.' field and press [ F8 ] to populate the mailbox information (the password field is blank for security reasons).
[ Tab ] to the 'password' field.
Clear the old password by filling the field with numerics, for example, 999999999999999, then backspacing to delete all digits. (Remember - the password doesn't show up so we must proceed as if it is the maximum length. If just the first few digits are overwritten, the ending digits may not change and we still won't know the correct password).
The 'password' may then be left blank or any numeric password may be entered.
Press [ F1 ] to complete the change.