1.Open the IIS manager console
2. Click on the server name
3. Click Server Certificates
4. Right Click and select Create Domain Certificate
5. Complete all the needed information and select your certificate store server. Make sure you use the FQDN for the server in the Common Name section.
6. Right Click on Default Web Site
7. Click edit Bindings
8. click on edit for https then select your newly issued certificate
9. You do not need to reboot the server or restart IIS.