SSLCACertificateFile

With this directive you will be able to configure the intermediate certificate matching the server certificate. But this directive was not created to do that in the first place and we advise you to use SSLCertificateChainFile if possible.
This directive has to point to a file. This file should be the intermediate certificate(s) of the server certificate.

See an example:

-----BEGIN CERTIFICATE-----
xxxxxxxxxx the intermediate certificate (that signed the previous certificate) xxxxxxxxx
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
xxxxxxxxxx if needed, the second intermediate certificate (that signed the previous certificate) xxxxxxxxx
-----END CERTIFICATE-----

There can be several intermediate certificate.

Apache then uses the content of that file to create (automatically) the certification chain.

In the Apache configuration file, you can use the directive in a VirtualHost with:

SSLCACertificateFile /etc/httpd/conf/ssl.crt/intermediate-cert.crt 

This directive can be used with:

• mod_ssl 2.0 and higher, see the official documentation
• apache 2.x and higher, see the official documentation
• apache-SSL, see the official documentation

This directive is normally used to specify th list of certification authorities whose client certificate is acceptable to get connected to the server.