Publish EAS client certificate authentication

Hi,

We're trying to publish Exchange Active Sync (Exchange 2013) client certificate authentication using ADFS/WAP Windows 2012 R2). We managed to publish OWA through WAP with ADFS pre-authentication, and it works fine. However, when trying to publish EAS (WAP with pass-through), it fails. Testing connection using tool from http://mobilitydojo.net/2010/05/19/securing-exchange-activesync-with-client-certificates-lan-access/, it gives the following error: 

Testing HTTP GET:
Response: The remote server returned an error: (403) Forbidden.
Explanation:
The server requires SSL and will not let you connect over HTTP.
(For instance trying to connect over HTTP while IIS requires SSL.)
Status: Further action required
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Testing HTTP OPTIONS:
Response: The remote server returned an error: (403) Forbidden.
Explanation:
The server requires SSL and will not let you connect over HTTP.
(For instance trying to connect over HTTP while IIS requires SSL.)
Status: Further action required

Thank you for any help.

---