Question

Is the best place set the 404 error page for SharePoint within the web.config customError section or is there a configuration setting on the site collection/ web application?

Answer 1

please have a read at this blog

pasted:

1. In your MOSS server, make a copy of %systemdrive%\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\LAYOUTS\1033\sps404.html and call it my404.html

2. Create a Virtual Directory in IIS under your MOSS root web application. For example /errors

3. Create your own redirect aspx page, for example /errors/my404redirect.aspx and code your redirect logic in there. This is a normal asp.net page.
4. In my404.html, make the following change: STSNavigate(‘/errors/my404redirect.aspx?oldUrl=’ + requestedUrl);

5. Create a Console Application and insert the following code and run it in MOSS server

   System.Uri webApplicationUri = new Uri(http://MyMOSSServer/); SPWebApplication webApplication = SPWebApplication.Lookup(webApplicationUri); webApplication.FileNotFoundPage = ‘my404.html’; webApplication.Update();

6. Now when you browse to a page that doesn’t exist, you should expect to be brought to the redirected page.