Cover art is not mentioned. Is there something that needs to be done with regard to this?
From the client, if I select an Album, Cover Art --> Get from Internet, I see the cover art dialog and when I click the Save Cover Art button, the box closes as per normal with no error. However, the Cover Art does not get saved in the shared directory and consequently is also not updated in the library.
As said, on the client I have "Tools --> Options --> File Locations --> Cover Art", set to save the cover art in the same folder as the file AND include in the file tag. I believe this is also set to the same thing on the server, but I'm guessing this make no difference (unless actually operating form the server).
I'm guessing that although the files are on a UNC Share (i.e. \\server\music\artist\album) and this location can be seen in the file location tag, as the file is referenced through the library, the client cannot resolve the actual location of the file. For instance, if you try to "locate" the file (either in MC or external using Explorer) get a response say that "m01p://server:52199/MCWS/v1/file/getfile?file=xxxx" does not exist.
Whilst not "officially" supported, I don't see why you couldn't rip to the share, these additions should then be updated on the server, but the cover art is still an issue.