Thanks Jim, I have downloaded it and will be looking to implement it soon. Just wondering is any one has implemented this, if so, any issues? Thanks Patrick ________________________________ From: Jim Kenzig http://thin.ms <jkenzig@xxxxxxxxx> To: windows2000@xxxxxxxxxxxxx Sent: Tuesday, April 21, 2009 5:43:09 PM Subject: [windows2000] Re: how to prevent user from logging in more than once - windows 2003 Microsoft has the Limitlogon utility. Description page at MS is here http://support.microsoft.com/kb/237282 and download here: (also at bottom of the page of above link) http://download.microsoft.com/download/f/d/0/fd05def7-68a1-4f71-8546-25c359cc0842/limitlogin.exe Here is a good article how to use it http://mcpmag.com/columns/article.asp?editorialsid=938 Jim Kenzig Blog: http://www.techblink.com Twitter: http://twitter.com/kenzig Twitter: http://twitter.com/InternetPilot On Tue, Apr 21, 2009 at 7:01 AM, Patrick <london31uk@xxxxxxxxx> wrote: Hi guys, I knew this was pretty straightforward with NT4.0, but is there a way to achieve this on windows 2003 without a 3rd party tool. I am sure the answer is easy, but somehow I seem to be missing it. Thanks patrick