Outlook 2010 is getting Certificate Error Message in a Ex2003/2010 Coexistence Environment
Posted on 2011-10-25
My company is moving from Exchange 2003 to Exchange 2010. Right now we've got both systems running in a coexistence environment.
There are no User's Mailboxes at Exchange 2010 servers yet. Some users are already using Outlook 2010 to connect to their mailboxes at Exchange 2003 servers.
This weekend I installed couple CAS Servers and configure autodiscover services. After that our outlook 2010 clients are poping up a certificate error message to the clients. Since I am installing the Exchange infrasctructre, this message was expected only on mailboxes that were running on Exchange 2010, not on that on Exchange 2003 Servers, because I haven't set up SAN certificates yet.
How can I get rid of this Certificate Error Message on Outlook 2010 used to access a legacy mailbox?