If the domain's Key Distribution Center (KDC) clock and the Kerberos client's clock differ by more
than 5 minutes, authentication will fail. If you suspect this reason for a user's inability to log on, you can verify
if the user's computer time is synchronized by using
NETDOM.EXE from the Windows Support Tools. The Syntax is:
netdom time ComputerName /verify
Example
netdom time jsi005 /verify
If the ComputerName is synchronized, you will
receive:
Computer Status
===
=
ComputerName In Sync
The command completed successfully.
NOTE: See
How do I configure an authoritative time server in Windows 2000?
NOTE: See How do I make my PDC emulator an authoritative time server for my domain
without it synchronizing with a reliable time source?