Hello. Recently I had to send my server in for service. I backed it up and when I got it back was able to successfully restore. All my devices that were there are there now with the exception of a Denon receiver that I use for outdoor music. It used to be visible via “airplay” under networked but now, nothing. I can’t seem to figure out how to get Roon to see it so i can add it back.
The first thing I would check is to see whether the Denon is visible on the network (i.e. it has a network address in the same address range as your Roon Core). For example, using the Windows File Explorer: