Once SSL certificate is generated based on CSR key, one need to install SSL Certificate for domain in request.
1) Open IIS Manager.
2) Click on the websites.
3) Right click on desired website for which one need to install SSL Certificate.
4) Select Properties.
5) Select Directory Security Tab.
6) Click on server certificates, Click next.
7) Select Process the pending request and install the certificate and click next.
8) Browse and select file path of SSL Certificate file and click next.
9) Click on finish to complete the installation.