Monitor User Logon

From: Johan (johan_at_rona.ca)
Date: 07/25/05 

Date: Mon, 25 Jul 2005 13:03:04 -0700

Can anyone please advise me how I can monitor user logons to our domain,
also the time they logon and logoff. I also need to save this information
for a period of three years, any suggestions how I can do this.
I have 4 domain controllers running W2K server 2000 SP4, with Active
Directory for Windows 2000.

Thanks
Johan