Users encountered credential prompts when I created an AAM manually and added a binding in IIS. I found the following article that states I should delete the manual creation and extend the web application to the zone I want it in:
http://support.microsoft.com/kb/2624320/en-us
I started doing this on the Manage Web Applications section in Central Admin to an existing Web Site (Sharepoint - 80), then stopped because I wanted to see the settings of the current web app.
Now, when I go back to try again, I click the current Web App, click Extend. When I go to choose "Use an Existing IIS Web Site", the only thing available in the box is "SharePoint Web Services". Where are the other IIS sites (Web Apps)?
I've tried iisreset, I've rebooted the SharePoint server, and it still stays that way. Am I losing my mind here and that's what's supposed to be there?
I believe I just wanted to extend the web app on the existing site and create the different host header and Public URL in the different zone...