Partner Certificates
The ID of the certificate can be found by viewing it (1). The ID should not be confused with the serial number.

A partner certificate contains only the public key of your communication partner and the certificate that assigns the information on the validity period and the owner to the key. Usually, you receive a partner certificate from your partner, e.g. by email either in PEM format or as a file.
Partner certificates can be managed (imported, viewed and revoked) here. Note: Partner certificates cannot be created. Your partner has to export his certificate together with his public key and make it available to you. Each partner certificate is assigned to a specific partner and can only be used for its channels. Since partner certificates contain only the public key, but no private key, they can be passed on without hesitation. However, it is not possible to import a partner certificate as a local certificate.
Import Partner Certificates
First, click button Import certificate (2). Then you can either copy the contents of a certificate file in PEM format directly into the window (as shown in the screenshot) or alternatively drag and drop a file in CER format into the window (3). Finally, click the button Apply (4).