We've been intermittently finding an odd issue; Outlook will pop-up the
There is a problem with the proxy server's security certificate.
Outlook is unable to connect to the proxy server FQDN.
(Error Code 80000000).
Clicking Ok on the message gets rid of it and Outlook acts normal. I've looked
at the Outlook connection status while the message is onscreen, and it shows
successful connections to HTTPS as well as usually a disconnected one for the
mailbox. OWA doesn't show any cert issues, and it's sporadic.
Exchange 2010 SP3, CU14 on Windows Server 2008 R2 SP1.k
Clients are Windows 7 SP1 x64, with Outlook 2013 SP1 x86.
Our CAS servers are behind an F5-LTM doing SSL off-load.
This isn't a new setup; the issue start occurring in the couple months as far
as I've been able to determine.
Senior Systems Engineer
550 East Washington Street
Indianapolis, IN 46204