I have 2 websites deployed in IIS 7.5 Express. The first website is the PRODUCTION website and the second is the TEST website. In the PRODUCTION website, I added an HTTPS binding and Require SSL so it is normal that it will force to redirect from HTTP to HTTPS. In the TEST website, I didn't add HTTPS binding and the Require SSL is disabled but I wonder why it still force to redirect from HTTP to HTTPS. Any idea why this happen? By the way, the PRODUCTION site uses the main domain (www.maindomain.com) and the TEST site uses only sub-domain (test.maindomain.com). I don't want the sub-domain to only use HTTP, not HTTPS. Thank you in advance.