The Microsoft Exchange Team blog posted about an issue people are experiencing in the field in which certificate revocation status check failures prevent you from assigning a certificate to any Exchange services. Here I demonstrate how to use proxy settings to work around the problem in some scenarios.
During an Exchange 2003 to 2010 transition a legacy namespace is configured for users who are connecting to Exchange 2003 mailboxes, and the certificate must be imported on the Exchange 2003 server.
Exchange Server 2010 like its predecessor Exchange Server 2007 makes heavy use of SSL certificates for various communications protocols. Before putting a new server into production you should create and assign a new SSL certificate for the server.
How to migrate your SSL certificates from Exchange Server 2003 to the Exchange Server 2007 Client Access Server.