We have an Exchange 2003 SP2 server (SBS2003) on which self signed certificate just recently expired. I have issued another self signed certificate. However a remote user using Outlook 2007 via RPC over HTTP receives the following error:
There is a problem with the proxy server's security certificate. The security certificate is not from a trusted certifying authority.
Outlook is unable to connect to the proxy server mail.<domain>.com. (Error Code 8)
I have accessed Outlook Web Access page (which works fine) on the PC and installed the new certificate to the "Trusted Root Certification Authorities" but the issue remains. I have created a new Outlook profile but no change.
I have confirmed that the server side is configured properly by going to
(as suggested by: http://www.msexchange.org/articles-tutorials/exchange-server-2003/management-administration/Troubleshooting-RPC-over-HTTPS-Part2.html
Anyone has encountered this and resolved it? I would appreciate your help.