Hi,I recently installed W2K8 over W2K3 and it is working smoothely.The only problem I'm facing is that the server lock out all internal users after a certain period of time.This happens every day. In order to overcome this issue, I have to restart the server.My server (SunFire X2100) has two network cards. One is connected to the ADSL and the other card is assosiated to the NAT.I tried to ping my network card from the server and I saw that the card is responding.Does anybody know how can I solve this problem?Thanks in advanceStelios