Question : Computer Time and Network Time are Different

I've started to run into this message more and more over the course of the last two weeks or so.  It started on a handful of Windows XP machines...they were unable to connect to the mail server because "the server time and workstation time are not the same".  I was able to correct the problem by going to every machine and server and syncing the time via:

net time //DomainController \set \yes

Even though the time on all machines was correct (I checked, double-checked, and triple-checked).  Same time, same date, same year, etc.  

Anyway, the problems SEEMED to have gone away..until now.  I just rebooted out mail server and now cannot log onto it with a network account because "the current time on this computer and the current time on the network are different".

But they aren't.  I logged onto the server with the Admin account and ran the net time command to sync it with our DC.  The command is successful, but I still get the same message.  One thing that concerns me is that we just applied that "Daylight Savings patch" to the mail server earlier this week...could that have anything to do with it?

Answer : Computer Time and Network Time are Different

Does your DC get time updates from some other computer?  Say a NTP server from the Internet.

You can verify tha that you have the DST patches by issuing the command:

     timezone /g  

The results should looks like:

Current Timezone is :

  Daylight Saving Time begins at 02:0:2:03
  Daylight Saving Time ends at 02:0:1:11

This shows that DST starts at 2 AM on the second Sunday of March and DST ends at 2 AM on the 1st Sunday in November.