I believe I have followed the install instructions well. When I try to connect with Outlook, I get repeated logon d-boxes. Using Basic Authentication on both sides. Looking in IIS logs, I see: 2008-09-21 11:56:41 10.80.0.10 RPC_IN_DATA /rpc/rpcproxy.dll ssd-mail.stowe.k12.vt.us:6004 443 ssd-mail.stowe.k12.vt.us\jfaunce 75.68.255.149 MSRPC 401 1 13262008-09-21 11:56:41 10.80.0.10 RPC_OUT_DATA /rpc/rpcproxy.dll ssd-mail.stowe.k12.vt.us:6004 443 ssd-mail.stowe.k12.vt.us\jfaunce 75.68.255.149 MSRPC 401 1 1326 Is there anywhere else I can look to narrow down what's wrong? Thanks

Hi, First please ensure that you have the right authentication settings on the below virtual directory. Both integrated Windows Authentication and Basic Authentication should has been checked. /Exchange /Exchweb /Public /Exadmin /RPC Then please user username@domain to logon Besides, you can follow the below article to use rpcping to troubleshoot the issue. Related information share with you: How to use the RPC Ping utility to troubleshoot connectivity issues with the Exchange over the Internet feature in Outlook 2007 and in Outlook 2003 http://support.microsoft.com/kb/831051 RPC over HTTP Authentication and Security http://technet.microsoft.com/en-us/library/aa996225.aspx How to Verify RPC Virtual Directory Configuration http://technet.microsoft.com/en-us/library/bb124175(EXCHG.65).aspx Hope it helps. Xiu