Azure Relay Hybrid Connections
The Azure Relay service was one of the first core Azure services, and it has developed nicely. For those familiar with the Windows Communication Foundations (WCF) Relay feature of Azure Relay, rest assured it will continue to function, but its dependency on Windows Communication Foundation won't be for everyone. The Hybrid Connections feature of Azure Relay will shed this dependency by using open standards based protocols.
Learn more about Azure Relay Hybrid Connections.