Steps to generate a CSR key:
[1] Go to ‘Internet Information Services (IIS) Manager’ (Start -> run -> inetmgr).
[2] Go to ‘Web Sites’ -> right click on your sub-domain and select the ‘Properties’.
[3] Go to the ‘Directory Security’ tab and then click on ‘Server Certificate…’.
[4] From the ‘Web Server Certificate Wizard’ click on ‘Next >’.
[5] Select the option ‘Create a new certificate.’ and then click on ‘Next >’ button.
[6] Select ‘Prepare the request now, but send it later’ and then click on ‘Next >’ button.
[7] Enter the name of the certificate and click on ‘Next >’ button.
[8] Enter the organization and organization unit and then click on ‘Next >’ button.
[9] Enter the common name (Generally, the name on which you want an SSL certificate. In this case, enter sub-domain.domainname.com) and click on ‘Next >’ button.
[10] Fill up the required details and click on ‘Next >’.
[11] Enter the file name to save the CSR key and click on ‘Next >’.
[12] Check the details that you have entered and then click on ‘Next >’ button.
[13] Click on ‘Finish’ button.
Steps to install an SSL certificate:
[1] Follow above steps from [1] to [4] again.
[2] Select the option ‘Process the pending request and install the certificate’.
[3] Browse the path of your SSL certificate and click on ‘Next >’ button.
[4] It will decrypt the certificate contents and displays on your screen and click ‘Next >’ to install an SSL certificate.
Regards,
Kailash