Difference between CSR creation and create domain certificate

certificate-authoritycsrself-signed-certificate

I'm a CA admin and I'm new to this field, Can any one explain the below scenario and explain the difference between them.

Scenario 1

System Admin creates a CSR file and give it to me… I will generate a
certificate by CSR file and issue it back to System admin

Scenario 2

System admin select the option " create domain certificate " instead
of CSR file.

What is the difference between them can anyone please explain this?

Best Answer

There is no difference, because "create domain certificate" option in IIS automatically creates CSR, submits it to CA server (ADCS) and installs it to web server. First option is manual process, second one is automatic.