There is no way to increase the physical number of users, however, you can change how long Windows 2000 waits before it considers a connection idle and disconnects it, which may allow more clients to access the system so long as they don’t all attempt to do so at once.
You can do this by using the net command:
net config server /autodisconnect: [timeout]
where[timeout] is a value in minutes. If you set it to 0, the disconnect happens in a matter of seconds.
Another way to do this is to edit the Windows Registry. Find the following key:
create or edit the DWORD AutoDisconnect and set it to the value in minutes to use. If you set it to 0, again, the disconnect will take place in a few seconds.
Using a value of -1 for either of these will cause client connections to persist indefinitely.