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Using a client-certificate without having a trust store

Kärcher
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11 Jun 2026 10:55 #14646 by Kärcher

Using a client-certificate without having a trust store was created by Kärcher

I work in an environment where my application needs to authenticate with the OPC server using a client certificate. I am assigned a certificate that I want to load and then use. In doing so, I have encountered two problems:
* The certificate I must use has no O. Therefore, I need to use the deprecated method: EasyUAApplication.Instance.ApplicationParameters.ApplicationManifest.InstanceCertificateSubject. Is there a way to do this that is not deprecated?
* The certificate is issued by a root CA over which I have no control. I therefore have to trust it. Is there a way to configure the loading of the certificate so that the prompt “OPC UA SDK Application Instance Message
Error during certificate verification. Exception: Certificate chain incomplete. Use certificate anyway? <Y/N/?>:” does not appear?

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