@Martin_Andersen I moved this to the Tinkering category where other users may be able to provide ideas and suggestions.
Just a few thoughts from my side. Assuming your work computer is running over WiFi or a cabled Ethernet connection, does ARC work on your phone when connected to the corporate WiFi network? If not, the security settings of your corporate network may not alllow for Roon to work, even if other applications do function properly.
Another thought that has come up from time to time. The simulator environment may create a virtual network interface, and Roon Support typically sees issues with these VNIs, especially transversing different subnets.