The Forefront Identity Manager Service cannot connect to the Exchange Web Service

The FIM Service server is standalone on WK28 64 Bit.  FIM Service account is Domain User, no admin rights.  Exchange server is remote and EWS is running.  Can connect to https://EWSServer/EWS/services.wsdl over browser from the FIM Service server.  However, get the following error in the Application log of the FIM Service Server (Title as above):

"The connection failure may be due to a network failure, firewall configuration error, or other connection issue.  Additionally, the failure may be due to incorrect Exchange Web Service configuration.

Verify that the Exchange Web Service is reachable from the Forefornt Identity Manager Service computer.  Ensure that Exchange is running, that the network connection is active, and that the firewall is configured properly.  Last, ensure that the Exchange Web Service Configuration is correct in the Microsoft.ResourceManagement.Service.exe.config file."

I believe the configuration to be correct in the config file and have tried several different configs to resolve the issue but none have worked.

Any ideas would be welcome

Rob