Windows Certificate Store

In Server-side authentication (SSA) for managers, SSL certificates are used to authenticate the managers.

The WinCC OA Multiplexing Proxy utilizes SSL to ensure secure communication.

Important: Note that only the WinCC OA Multiplexing Proxy and Server-side authentication (SSA) for managers certificates can be converted into Windows Certificate Store format and imported to Windows Certificate Store.

The HTTP-Server certificates cannot be converted into Windows Certificate Store format and imported to Windows Certificate Store.

SSL Certificates

For SSL communication and authentication, both file-based certificates and certificates stored in the Windows Certificate Store can be used.

To open the MMC and access certificates, type cert into the Start menu search field.
Figure 1. MMC - Certificates

These chapters provide an overview of how to use the Windows Certificate Store certificates: