You could use a Unity Directory Handler. Have a look at the funtionality;
Directory handlers provide directory assistance in Cisco Unity that callers can use to reach subscribers. When a caller searches on a subscriber name or part of a name, a directory handler looks up the extension and routes the call to the appropriate subscriber. Subscribers must have recorded names to be accessed by using directory handlers.
Each directory handler contains settings that specify how it searches for names, what it does when it finds one or more matches, and what it does when it detects no caller input.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.