>I get the following message when trying to log on to any machine on my domain. (NT server 4.0, with 4.0 workstations)
>
>"A domain controller for your domain could not be contacted. You have
>been logged on using cached account information. Changes to your
>profile since you last logged on may not be available."
>
>Any ideas on what causes this? Everything was working fine yesterday, nothing has been changed, there have been no power failures, and I can't see anything that would make the domain controller (my server I imagine?) not visible to the other machines.
>

If you're using TCP/IP to connect to the server, and DHCP (IOW, your machine gets an IP address assigned each time it connects to the net, as opposed to a static IP address, which is assigned permanently to a single machine) it's possible that either (1) there are no free IP addresses available for the DHCP server to assign (IOW, there are more machines than available IP addresses controlled by the DHCP server), or (2) the DHCP server or service is down or disabled.

Ed