Tip #41: Did you know... establishing a remote connection to a IIS server with self-issued certificate will require a certificate validation delegate?

Either through WMSvc or through your own script, whenever you try to establish a connection with a remote server, which doesn’t provide a trusted certificate you need to provide a delegate for this certificate validation check to validate untrusted certificates.

The signature for this delegate is as follows

Namespace: System.Net.Security
Assembly:  System (in System.dll)

public delegate bool RemoteCertificateValidationCallback(      Object sender,      X509Certificate certificate,      X509Chain chain,      SslPolicyErrors sslPolicyErrors  )

Thus, to accept ALL server certificates, you will need to set the callback of ServicePointManager to validate a server certificate in the following manner:

ServicePointManager.ServerCertificateValidationCallback = RemoteCertificateValidationCallbackFlag;    bool RemoteCertificateValidationCallbackCheck(      Object sender,      X509Certificate certificate,      X509Chain chain,      SslPolicyErrors sslPolicyErrors  )  {      return true;  }

For the official MSDN documentation on this delegate refer to RemoteCertificateValidationCallback Delegate and ServicePointManager.ServerCertificateValidationCallback Property

Kateryna Rohonyan
SDET, IIS Team

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