We are running a Small Business Server 2000, we have a total of 35 licenses.

Every once and a while for no reason users get kicked off the server and their account gets locked out.

Now this does not happen to everyone nor does it always happen to the same people. I have searched everywhere for a reason this happens.

We thougt it was a licenses issue so we install more licenses but that did not work.
I have applied all the lastest updates and scaned for viruses, I have also check the firewall log for anyone trying to hack in with a password list. Nothing is there.