Session Host Virtual Machine Health Check Status - TURNRelayAccessHealthCheck

Whilst carrying out some standard healthchecks this morning on our environment we have come across the following in the Health Check Status:

- TURNRelayAccessHealthCheck

This has appeared out of the blue and we have never seen it before on any of the other Session Host Virtual Machines.  How anyone come across this before and if so what was the cause and resolution?

Thanks in advance,

Phil