Hi @pcryan5 

Thanks for your post!

Those settings do not refer to servers built into Sonos devices. Instead, they refer to servers present on the network, such as if you have Windows Media Player running on a PC (with Show Media Servers on, the WMP PC will appear as a media source in the Sonos app’s Browse screen). UPnP refers to DNLA, which is a protocol for sharing media files on a local network.

These features are largely undocumented, but have been added for those who utilise such protocols.

I hope this helps.

Thanks Corry!