AMTDiscoveryWSMan::DoConnectToAMTDevice: Failed to establish tcp session to

After trailing through the SCCM OOB logs I came accross the following event:

AMTDiscoveryWSMan::DoConnectToAMTDevice: Failed to establish tcp session to 192.168.0.254:16993.    SMS_AMT_OPERATION_MANAGER    08/04/2015 14:15:37    1020 (0x03FC)

In my case I had setup SCCM to use a secure connection (port 16993) - where I had not setup TLS on my AMT clients and hence should be using port 16992 (which is used for non-secure connections).

AMT discovery no longer uses port TCP 16992; only port TCP 16993 is used.