How to install CA certificate issued from Root CA on Enterprise Sub CA

After importing the Root CA certificate in "Trusted Root Certification Authorities", open the "Certification Authorities" Console (Start > Programs > Administrative Tools > Certification Authorities). The red squre on the server icon denots that the Certificate Services are not running on this server.

Install CA certificate on Enterprise Subordinate CA - Certification Authority Console

Right click the server and select "All Tasks > Start Service" from the context menu.

Install CA certificate on Enterprise Subordinate CA - Start Certificate Services

Click "Yes" on the dialog box, which shows the CA certificate is missing and whether you want to install a new certificate.

Install CA certificate on Enterprise Subordinate CA - dialog box confirm certificate install

In "Select file to complete CA installation" dialog box, show the physical path where the certificate for the Enterprise Subordinate CA is kept (certificate file which is generated from the Root CA for the enterprise subordinate CA).

Install CA certificate on Enterprise Subordinate CA - Select CA certificate

Click "Open". The installation will be completed now.

Install CA certificate on Enterprise Subordinate CA - Installation completed

The green check mark in the server icon shows that the Enterprise Subordinate Certificate Authority services are started.