I've noticed that I'm not seeing any online (VATSIM) traffic on the PFD/MFD displays.
I've gone through the options on both the ATC/TCAS control on the FMS and on the PFD/MDS options.
Also, if the TCAS control on XP is set to LiveTraffic, it doesn't show also.
I might be missing something (most likely) but, just as a reference, on the ToLiss aircraft, TCAS needs to be set to On instead of Auto (why, I do not know).
Traffic (Online or Live) works on all other aircraft. So, I'm