Troubles with client certificates in Windows Phone 8.1 WebViews

Question

Hi,
I'm having difficulties using a client certificate in Windows Phone 8.1 WebViews.
My code works fine in my Windows 8.1 App but i get a WebErrorStatus=[CertificateIsInvalid] in WebView.NavigationCompleted in WP.
I'm using this code to import my certificate :
await CertificateEnrollmentManager.ImportPfxDataAsync(certificateBase64, certificatePassword, ExportOption.NotExportable, KeyProtectionLevel.NoConsent, InstallOptions.None, "MyClientCertificate");
I have no problem using this cert in HttpClient with either Windows 8.1 or Windows Phone 8.1.
I don't understand why it doesn't work with the WebView control only on Windows Phone.

Answer 1

Tried it with no success.
But I just found this : https://blogs.msdn.com/b/wsdevsol/archive/2014/07/31/programmatically-create-and-configure-a-client-certificate-for-use-in-your-windows-runtime-based-app.aspx?Redirected=true
With the note at the bottom: 
Note: For Windows Phone 8.1, you need to attach the Client Certificate programmatically. For Windows, once you install the Client Certificate to the app container
store and do not attach the client certificate with the HttpClient request, the HttpClient class will automatically detect that there is a single certificate installed in the app container store and forward it to the server. However in the case of Windows
Phone 8.1, there is no such “automatic” selection of the certificate and one MUST provide the certificate programmatically.
Since there seems to be nothing to attach a custom HttpBaseProtocolFilter to a WebView, it doesn't seem possible atm.