By default the top of the /wp-settings.php file will look like this...

In order to preserve the url structure we have setup for IT Tuesday, there is a small fix that must be pasted into the code. It looks like this...

Comparing the two we can see that the following code needs to be added directly after the <?php tag on line 1...

//*******************************************************

//    IIS FIX

//

$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];

//*******************************************************

Once added and saved, the file is ready for a seamless upgrade.