This is so weird I feel compelled to ask for advice.
I have a handful of workstations who are receiving time from a GPS timeclock. The PDC has the default domain policy set to use the GPS timeclock as the NTP timesource. All the workstations sync to the timeclock with precision ranging from 50ms to 1.5ms so my delta values are grossly within margins for Kerebos tickets.
Almost all the workstations access my fileserver with absolutely no problems, however a single workstation began prompting me with the message
This server's clock is not synchronized with the primary domain controller's clock and unless
w32tm /stripchart /computer:PDC is lying, 20ms is more than close enough to be synchronized.
Is there something I might be missing here?