Is the caching the users passwords disabled on the PCs in question? And
is perhaps the NIC being turned off by the operating system when the PC
is locked?

D. Harrison wrote:

> Users in a domain lock their computers. When they return and attempt to
> unlock the computer they are unable. We have confirmed that the user account
> is not locked. After resetting the user's password they receive the following
> message when they attempt to unlock the computer:
>
> "Please change your password at another machine and retry or contact your
> Domain Administrator".
>
> Users are not allowed back into the computer. Our only workaround has been
> to reboot the computer. Once the system has been rebooted the users can log
> in.