Login to cPanel / Plesk account and need to click on AutoInstallSSL
Once clicked on AutoInstall SSL , need to copy the TOKEN ID
which received in email and need to paste in the "Token" section and
click on "Verify Token"
Fill the domain name in "Domain/webspace"
Need to fill "CSR Details, Admin Contact, Tech Contact" and "Submit"
Once, the details are submitted, need to just wait and watch
the progress of SSL installation without doing anything else. This auto installation/verification will not take more than 5 mins.