How to add client certificate to windows server 2008R2 for Exchange 2010_SP3

Hi Team,

I have a problem with securing call to Exchange 2010_SP3. Currently we are usingEWS API 1.2 to make a call to Exchange server to get the calendar details. As of now we are connecting to Exchange using non secure protocolHTTP. We, need to make this call a secure one using HTTPS. We are making this Exchange call using EWS API from a java code. My doubt I have setup Exchange in one my VM and inIIS console I have changed the SSL settings to SSL required and HTTPS call is working. In that IIS console we have a 3 radio button for client certificates like Ignore, Accept and Require. If I select the client certificate as require my call is failing with an error saying connection cannot be established. Can you please let me know how can I create a client certificate and install in Exchange server 2010_SP3. Also can you please tell me how the exchange will be setup in production like whether the client certificates will be selected as Ignored or Accepted or Required........Also since I am making this Exchange call from java usingEWS API do I need to write any java code to validate client or Server certificates for making this Exchange call a secure one usingHTTPS protocol

Please see the Error Logs as below:-

microsoft.exchange.webservices.data.EWSHttpException: Connection not established
    at microsoft.exchange.webservices.data.HttpClientWebRequest.throwIfConnIsNull(Unknown Source)
    at microsoft.exchange.webservices.data.HttpClientWebRequest.getResponseCode(Unknown Source)
    at microsoft.exchange.webservices.data.EwsUtilities.formatHttpResponseHeaders(Unknown Source)
    at microsoft.exchange.webservices.data.ExchangeServiceBase.traceHttpResponseHeaders(Unknown Source)
    at microsoft.exchange.webservices.data.ExchangeServiceBase.processHttpResponseHeaders(Unknown Source)
    at microsoft.exchange.webservices.data.SimpleServiceRequestBase.internalExecute(Unknown Source)
    at microsoft.exchange.webservices.data.GetUserAvailabilityRequest.execute(Unknown Source)
    at microsoft.exchange.webservices.data.ExchangeService.getUserAvailability(Unknown Source)
    at com.taleo.em.service.integration.exchange.EWSTestSuite.checkUserAvailability(EWSTestSuite.java:123)
    at com.taleo.em.service.integration.exchange.EWSTestSuite.main(EWSTestSuite.java:87)

Thanks,

Anuj Jain