How to achieve A Grade SSL Certificate on IIS

In this tutorial, we will learn how to achieve A Grade SSL Certificate on IIS. Secure Sockets Layer(SSL) certificate is used to secure your website by encrypting your web traffic. In the Windows Server environment, we generally use Internet Information Service(IIS) as a web server and install an SSL Certificate on it to make a secure(https) website. Open https://www.ssllabs.com/ssltest/ and put your website URL say https://devopsmyway.com and submit.
Here you can see my website is having A Grade Certificate. Let suppose you get B, C, D, E or F certificate for your https website. In that case, you need to do the changes in your registry to get the A Grade Certificate as per given URL.