Thank you for giving that a try, @james_newman1.
Interesting that there is still something that is preventing a connection between the ms600 and Roon.
I’d like to propose another test. If you happen to have another device that you could temporarily install Roon on, I’d be interested to know if you can see the the devices there. This would be a great data point that would help us narrow down the cause of this behavior here. This would give us insight into whether or not there is something preventing the connection on the Core computer or if it is in fact networking related.
Thank you for your continued patience and cooperation as we continue to investigate here. It truly is appreciated!