I have a one server with Exchange 2007 SP2 with CAS & HT roles. Test RPC Connectivity in web page https://www.testexchangeconnectivity.com and show the following error: Testing HTTP Authentication Methods for URL https://owa.unicovirtual.net/rpc/rpcproxy.dll. The HTTP authentication test failed. Additional Details Exception details: Message: The underlying connection was closed: The connection was closed unexpectedly. 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() A idea for solved problem? Regards,

Hi, Please Set-OutlookAnywhere -Name Server01 -IISAuthenticationMethod Basic,NTLM, then restart the IIS and check this issue. Thanks AllenAllen Song

Here's a whitepaper for Autodiscover, it provides very good details http://technet.microsoft.com/en-us/library/bb332063%28EXCHG.80%29.aspxJonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

Thanks Allen. Autodiscover working succesfully. Best Regards,