Windows Certificate Store
In the Server-side authentication (SSA) for managers the managers use SSL certificates to authenticate themselves.
The WinCC OA Multiplexing Proxy and the HTTP-Server use SSL for the secure communication.
For the SSL communication/authentication filebased certificates and certificates stored in Windows Certificate Store can be used.
Open the MMC and certificates by typing "cert" into the start menu search field.
These chapters provide an overview of how to use the Windows Certificate Store certificates: