I am changing a set of pages in my root from .html to .asp extension. My question: Should I leave the content of the .html version on each page or delete it with a 301 redirection to the new .asp page? Right now they are both sitting on the server and I'm trying to prevent any duplicate content issues. Also , Is this the correct way to apply a 301 redirect to each individual page in my root on an IIS server (see below)? And how long should I leave the old .html version up? IIS Redirect * In internet services manager, right click on the file or folder you wish to redirect * Select the radio titled "a redirection to a URL". * Enter the redirection page * Check "The exact url entered above" and the "A permanent redirection for this resource" * Click on 'Apply' Thanks