Outlook Anywhere test failing

Hey Guys,

Using Exchange 2007 sp2 with server 2003 r2.

I did the Outlook anywhere test at testexchangeconnectivity.com/

In the outlook anywhere test everything passes as it has 5 other parts in the same test, but the last one fails with the following message:

Testing Http Authentication Methods for URL https://mail.domain.com/rpc/rpcproxy.dll
       Http Authentication Test failed
      Additional Details
       Exception Details:
Message: The server committed a protocol violation. Section=ResponseStatusLine
Type: System.Net.WebException
Stack Trace:
at System.Net.HttpWebRequest.GetResponse()
at Microsoft.Exchange.Tools.ExRca.Tests.HttpAuthMethodsTest.GetSupportedHttpAuthMethods()
at Microsoft.Exchange.Tools.ExRca.Tests.HttpAuthMethodsTest.PerformTestReally()

Please help
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And are you using Autodiscover for Outlook anywhere, if yes please let us know the certificate that is in use.
And if you are using Outlook anywhere (RPC over HTTPs) then check the below mentioned steps.

Please check whether you have Basic authentication enabled on the Outlook Anywhere in CAS server.
De-Select SSL offloading if it is enabled.
Check the same in the RPC Virtual Directory in IIS Manager, we should have Basic Auth with SSL enabled.
make sure first try to access https://mail.domain.com/rpc/rpcproxy.dll  externally, we should get Blank page.
If thats the case, if we have internal certificate installed the same in the workstation and try Outlook anywhere.

Please revert back if you have any concern.


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