Since server version 4.8+, all library options (including library Content Type) are db-only and any desired changes need to be done via Emby Server REST API service (previous method of changing options via options.xml files is deprecated). Method below describes using Swagger: 1. Access Swagger by navigating to your Dashboard>scroll to the bottom of the page>select "API" hyperlink   2. Obtain library "Id" from /Library/VirtualFolders/Query endpoint: