I installed 2016 GUI and I get the same results as using 2016 Core installation.
Roon Core (Win 10) cannot see RoonBridge on Server 2016 either in GUI or Core installation. I am testing with the latest RoonBridge. Each PC is seen in NETWORK, each can map drives to each other.
Roon Core sees 2016 RoonBridge when viewing software versions (Settings/About).
Would be nice if this could be looked at by the Roon Support Team as we patiently wait.
RoonBridge works with Server 2012R2 Core.