If we installed Both English and French in the unity.How does the system know which language it should play for the user? For example, A French user access his mailbox, the unity should play French as system prompt,conversation menu, and so on. How does the Unity handle that?
There's an entire chapter in the administration guide entitled "Languages" which goes into how this works and the setup for languages in the TUI, GUI and for the TTS. You'll find the chapter in the guide for 4.0(3) here:
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.