WMI -> MicrosoftActiveDirectory -> MSAD_ReplNeighbor -> TimeOfLastSyncSuccess - and it comes up with an error when clicking add to add a threshold - with error
Unsupported datatype (DateTime)
The reason is that this counter returns a date/time and we do not have any method of storing date/time QoS.
Only counters which return an integer/decimal point can be monitored in this way. This would be an enhancement request