Media Sharing will only share local content in the library. Any UNC paths that have been added to the library will not be visible to the UPnP Media Client. By default you can only stream local content.
If you want to share files in a monitored folder that is located on another computer, like for example, a folder on a network share, the remote folder must have the appropriate Windows access permissions assigned to it.
To do so, open regedit and navigate to the following registry key:
In right panel create a new DWORD called EnableRemoteContentSharing
- Set its value to 1.
This will enable sharing of media from a network location.
Typically when adding network locations to a library, they must normally either be indexed (made available offline). Windows Media Player maintains its own database, and hence it is able to add non-indexed locations to a library.
Do note the computer that contains the library should have remote content sharing enabled.
This post was pretty much stolen from http://jaredheinrichs.com/how-to-stream-windows-media-player-content-from-a-folder-on-a-network-share.html. I use my site as a place for me to refer back to, rather than having to Google the interwebs to find Jared’s site again.