i have 1400 user now.
they can login on to a pc and can also login to another.
what must i do to let login every user only 1 time ?

Take a look at
237282 Limiting a User's Concurrent Connections in Windows 2000 and Windows
NT http://support.microsoft.com/?id=237282

--
Tim Hines, MCSE, MCSA
Windows 2000 Directory Services

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"kloenie" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> i have 1400 user now.
> they can login on to a pc and can also login to another.
> what must i do to let login every user only 1 time ?