The Rich Media Sessions license is the Traversal Calls license actived by the Expressway Series license. If you want you VCS-E to be a Expressway-E you just need to purchase a Expressway Series license. In fact, the an Expressway-E does not need a release key. please see the attached pictures for details.
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.