How to I can find the log file which include all log-in and log-out of each user since server function on line? I have a server for shared files running with Windows Server 2003. Thanks by your help.

You'll need to enable auditing and then filter the security log. Here's how to: http://technet2.microsoft.com/windowsserver/en/library/e104c96f-e243-41c5-aaea-d046555a079d1033.mspx?mfr=true If you need more help in this question, please post your question in the relevant forum, you'll find it here: http://www.microsoft.com/windowsserver2003/community/default.mspx. This forum is for Windows Server 2008.