It seems our domain controllers are no longer synchronizing with the default time.microsoft.com time servers and I'm having difficulty troubleshooting the problem. I supsect it's a change to our router or firewall config but I'm having trouble proving this... I was hoping to run the w32tm -test -v command to determine whether connectivity to time.microsoft.com exists, but the -test switch is not supported in XP or Server 2003 (doh!). Is there a similar command I can use? Dan.