Hello! We primarily used Zimbra for syncing emails and calendars. Now, we need to sync mobile phones to our Zimbra accounts. I successfully sync Android phones, iPhones and Blackberry but I was unable to sync Windows Phone successfully. The server that we are using has their own self-signed certificates and our client cannot afford to buy other certificates. I am receiving error when trying to set up account in Windows Phone. The error is: The server's certificate has problem. Contact your technical support. Error code: 80072F0D. How can I be able to sync with this kind of certificate? Can anyone help?