The MWI indication is actually a status from the Exchange server and is beyond the control of Unity. So when the message is in the preview pane, the email message status will be changed to READ on Exchange. If you mark the message as marked UnRead in Outlook, you will see that the MWI will turn back on.
There is a setting that tells Outlook to not mark a message as read when viewed through the Preview Pane. In Outlook, go to Tools -> Options -> Other -> Preview Pane/Reading Pane (depending on your version). Uncheck the first check box. Users will then have to double-click a message for it to be marked as read and therefore turn off the MWI.
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.