1. In the certificate store toolbar, click the button .A dialog will open that lets you navigate to the desired certificate file and open it.Different file formats are supported (.der, .cer, .crt, .cert, .pem, .pfx, .p12).If you have a certificate with an unknown file extension, expand the file filter to "*.*" and try to open the file anyway. This works in most cases.

2. When the certificate is loaded, it appears in the certificate store list.

3. If you have not already done so, trust the certificate.

Certificates can sometimes be added without manual import.

Thus, during the first connection attempt by an OPC UA client to the OPC UA server (ibaPDA), the application certificate of the OPC UA client is automatically added to the certificate list and initially rejected.

Once you have selected the OPC UA client certificate in the list and confirmed it as trusted with the button the OPC UA client can subsequently connect automatically.

Use the button to reject a certificate at any time or to classify it as not trusted.