The music on hold audio source is selected by the device putting the call on hold. The MRGL used to determine a MOH resource is selected by the device being put on hold. MOH sources can be configured clusterwide with a service parameter, at the Device Pool, Device, and Line levels. Preference is given in the reverse order of the items just listed. In each of these cases, you can select the User Hold Audio Source (what callers hear when the user presses the Hold softkey) and Network Hold Audio Source (what callers hear when being transferred, etc.) Take a look at the following link.
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.