Plex 0.9.15.1-1639
DSM 5.2.5644U2
DS1515+
Plex seems to be ingesting the music but ignoring the iTunes Library.itl and iTunes Music Library.xml files, so playlists, dates added, ratings, etc aren't making it into Plex (as in, just like the "Import iTunes Library" option was left unchecked when creating the library).
How does Plex import an iTunes music library once it's been moved from a computer to a DiskStation? Do you need the ITL or XML files or both? Where do they go? Is there a walk-through available?