You can easily dispaly your own HTTP 404 Page Not found Error page for each of your SharePoint Web Application. A custom Error page can be associated with each Web Application in SharePoint and you can redirect the 404 error page to your own specified error page. SharePoint has it's error Pages stored at this location: 14\TEMPLATE\LAYOUTS\1033\ERRORV4.html 14\TEMPLATE\LAYOUTS\1033\sps404.html The one we need is the sps404.html. If you open this page you will see: STSNavigate("/_layouts/spsredirect.aspx?oldurl="+ requestedurl); Here spsredirect.aspx is the Error page currently used by sharepoint. So what we need to do is, first make a copy of the sps404.html, rename it - in my case mscom404.html and save it at the same location (14\TEMPLATE\LAYOUTS\1033).Now in the STSNavigate replace spsredirect.aspx with your own aspx page. The url in STSNavigate should be a properly working url, then only the redirection will work. as you can see in the code above, i'm placing my e