DirectAccess client unable to resolve DNS names for probes

Hi I am testing client connectivity to DirectAccess. All the operational Status lights are green yet client cannot connect nor do I see any bytes outgoing from DirectAccess Client Monitor. The client troubleshooting tools states the corp dns server cannot be pinged. Any idea how I can further troubleshoot issue would be greatly appreciated.

DirectAccess Logs

Connectivity System Settings DNS/Naming DirectAccess Connectivity Status 

 DirectAccess connectivity status for user: XXXX\xxxxx is

Error: Corporate connectivity is not working. Windows is unable to resolve DNS names for probes. 23/12/2014 23:35:41 (UTC)

Probes List

HTTP: http://da.xxxx.com/  (Fail)

 HTTP: http://directaccess-WebProbeHost.xxxx.com (Fail)

DTE List

PING: 2002:4800:xxxx::4800:xxx  (Pass)

 PING: 2002:4800:xxxx::4800:xxx  (Pass)