Exchnage 2010 , outlook anywhere

Try running IISRESET and then check again
Ensure all Exchange services are running

http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/9431202c-7c94-4f3f-be76-f39a5659efd8

https://www.experts-exchange.com/questions/26205751/Exchange-2010-RPC-error.html

- Rancy

I reinstall RCP over HTTP , restart server , IIReset.   No change.

Testing RPC/HTTP connectivity.
       The RPC/HTTP test failed.
       
      Test Steps
       
      Attempting to resolve the host name mail.edataplatform.com in DNS.
       The host name resolved successfully.
       
      Additional Details
       IP addresses returned: 66.135.63.47
      Testing TCP port 443 on host mail.edataplatform.com to ensure it's listening and open.
       The port was opened successfully.
      Testing the SSL certificate to make sure it's valid.
       The certificate passed all validation requirements.
       
      Test Steps
       
      ExRCA is attempting to obtain the SSL certificate from remote server mail.edataplatform.com on port 443.
       ExRCA successfully obtained the remote SSL certificate.
       
      Additional Details
       Remote Certificate Subject: CN=mail.edataplatform.com, OU=Domain Control Validated - RapidSSL(R), OU=See www.rapidssl.com/resources/cps (c)13, OU=GT14389968, SERIALNUMBER=0iyeDHFFKyxz-TmRK7U10DMTrKNStssM, Issuer: CN=RapidSSL CA, O="GeoTrust, Inc.", C=US.
      Validating the certificate name.
       The certificate name was validated successfully.
       
      Additional Details
       Host name mail.edataplatform.com was found in the Certificate Subject Common name.
      Certificate trust is being validated.
       The certificate is trusted and all certificates are present in the chain.
       
      Test Steps
       
      ExRCA is attempting to build certificate chains for certificate CN=mail.edataplatform.com, OU=Domain Control Validated - RapidSSL(R), OU=See www.rapidssl.com/resources/cps (c)13, OU=GT14389968, SERIALNUMBER=0iyeDHFFKyxz-TmRK7U10DMTrKNStssM.
       One or more certificate chains were constructed successfully.
       
      Additional Details
       A total of 1 chains were built. The highest quality chain ends in root certificate CN=GeoTrust Global CA, O=GeoTrust Inc., C=US.
      Analyzing the certificate chains for compatibility problems with versions of Windows.
       Potential compatibility problems were identified with some versions of Windows.
       
      Additional Details
       ExRCA can only validate the certificate chain using the Root Certificate Update functionality from Windows Update. Your certificate may not be trusted on Windows if the "Update Root Certificates" feature isn't enabled.
      Testing the certificate date to confirm the certificate is valid.
       Date validation passed. The certificate hasn't expired.
       
      Additional Details
       The certificate is valid. NotBefore = 5/1/2013 10:31:51 AM, NotAfter = 5/3/2015 8:18:22 PM
      Checking the IIS configuration for client certificate authentication.
       Client certificate authentication wasn't detected.
       
      Additional Details
       Accept/Require Client Certificates isn't configured.
      Testing HTTP Authentication Methods for URL https://mail.edataplatform.com/rpc/rpcproxy.dll?mail.edataplatform.com:6002.
       The HTTP authentication test failed.
       
      Additional Details
       A Web exception occurred because an HTTP 404 - NotFound response was received from Unknown.
Microsoft-Remote-Connectivity-An.htm

https://66.135.63.47/rpc/rpcproxy.dll  gives login / Password window , then blank page

As my comment is the solution...