Turn on Auditing of "Account Logon Events"
in Windows 2000 Server:
Click [Start]
Settings
Control Panel
Administrative Tools
Active Directory Users and Computers
Right-click on your domain name in the console tree
Click Properties
Group Policy tab
Click [Edit]
In the left pane, navigate to...
+ Computer Configuration
+ Windows Settings
+ Security Settings
+ Local Policies
+ Audit Policy
Right-click "Audit account logon events"
Click Security
Check the box next to "Audit successful"
Click OK
Right-click "Audit logon events"
Click Security
Check the box next to "Audit successful"
Click OK
"Auditing in Windows 2000 Server"
http://www.microsoft.com/windows200...sbook/c09_auditing_in_windows_2000_server.asp
"Audit Account Logon Events"
http://www.microsoft.com/technet/prodtechnol/windows2000serv/maintain/monitor/logevnts.asp
"Tracking Logon and Logoff Activity in Windows 2000"
http://www.microsoft.com/technet/prodtechnol/windows2000serv/maintain/monitor/logonoff.asp
Microsoft Knowledge Base Article - 174073
"Auditing User Authentication"
http://support.microsoft.com/support/kb/articles/q174/0/73.asp