I use this player to access windows shared folder and synology shared folder without any issue. I didn't install any DLNA service.
DLNA is built into windows, no installation required. I'm not familiar with the Synology software but I wouldn't be surprised if it had DLNA built in as well. enabling that service allowed my dad's roku to see the shared media folders on the OMV box I set up for him.
Windows doesn't call it DLNA, synology may not as well but here's a link on how it's set up on windows. https://www.howtogeek.com/2154…into-a-dlna-media-server/