Hello, we just installed Exchange 2013 CU1 into our Exchange 2010 SP3 Organization, and are now having problems. All DNS records still point all users to the Exchange 2010 CAS and all mailboxes still reside of the Exchange 2010 Mailbox server.
However, now that co-existence is happening, our users are getting Security Alerts in Outlook stating "The name on the security certificate is invalid or does not match the name of the site". We have configured the new Exchange 2013 CAS
servers with our public CA SSL certificates. We have also configured Outlook Anywhere on the Exchange 2013 CAS to use public DNS name. We have also used the Configure External Access Domain option under Virtual Directories to configure the
External Access name. However, users are still getting the popup. Why is this happening since no Exchange 2013 servers are directly in play? Also, this doesn't make sense, because Exchange 2013 is no longer suppose to expose the internal
server name during connections (since RPC is no more), correct? Thanks for any help!
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