Hello.
You edit the admin.authorizedJIDs field, which is located in the "System Properties", add the user you want to include, separated by (coma), and marks the "Do not encrypt this property value" and "Save Property" option.
Cuidade much !! Should repitir operation twice, before closing the console. I realized that in version 3.9.3, after you changed, it shows the blank field that has undergone change. This happens in any field of system properties.
Att.
Antonio