I've setup my custom 404 page in DNN and configured it on the site settings and it works find from within DNN or when I input a incorrect URL in the browser.
However I've recently updated a website and resubmitted a sitemap to google and google still has over 1000 pages indexed with an old wordpress site on that domain. Almost all indexed pages return a 404 page from IIS7 and is not going to my "friendly 404" page on DNN.
I've setup .NET error pages in IIS to point to www.mysite.com/404.aspx and it didnt work.
Cannot add ?status=404 to the end of the URL as IIS will not accept special characters.
I've review the following post http://www.dnnsoftware.com/wiki/dnn-404-handling
but cannot find any solution there. If anyone has some insight i'd appreciate it.