Read original post by Nigel Sampson at MarkerMetro
Often when integrating a Windows Phone app with a third party service that’s not a production service you’ll occasionally run into a self-signed SSL certificate.
For obvious reasons by default Windows Phone doesn’t like these certificates as they can’t really be trusted. If you try and make a web request you’ll find it errors with a 404 (not very helpful).
SSL Certificate InfoSo how can we get the phone to call to the service? What we need to do is install the certificate on the phone itself. First you need to download the certificate from the server. In browser navigate to the domain in question and click on the familiar padlock and bring up the Certificate Information dialog. Under Details select “Copy to file”, and select the P7B file format (you don’t need to include all the certificates in the path).