Windows Server’s Certification Authority offers a web interface to request certificates, available at the following URL: https://nomeserver/CertSrv.
When I tried to connect to an Enterprise CA installed on a Windows 2008 server, I got this error message: 401 – Unauthorized: Access is denied:
Open the IIS management console, select CertSrv virtual directory and click Authentication:
Choose Windows Authentication and, on the right, Providers…:
Select NTLM and click Move Up, to move that element to the top of the list:
After having restarted IIS, you can connect to CA’s web interface: