A small customer has Outlook 2010 connecting to Exchange Server 2013 on a Windows 2008
R2 server at a remote site. Recently, the users began receiving a security
alert ("The identity of this web site or the integrity of this connection
cannot be verified", "The name on the security certificate is invalid
or does not match the name of the site"). This occurs every time a user
opens Outlook, and when they click on "Yes" they are able to use
Outlook normally. <o:p></o:p>
This problem began not long after 1) the wildcard ssl certificate was renewed and 2)
Exchange 2013 was updated to the most recent SP and CU. It is noteworthy that
the PCs being used are not members of the domain. The users also receive this
error if they use Outlook to connect from their home PCs. <o:p></o:p>
The Exchange server passes connectivity and autodiscover tests. I have checked all the URLs
in Exchange Server. I have tried changing authentication, re-enabling the the
*.domain.ca certificate, I have not been able to reproduce the error on my own
laptop from the customer's site. <o:p></o:p>
This problem is not critical, but it is annoying for the users, and I have tried
just about everything I can find on the Internet to resolve it. <o:p></o:p>
Any suggestions? <o:p></o:p>