We have an Exchange 2010 Server and are looking to migrate to Exchange 2013. I have setup new server and everything is working. I did move one mailbox and it does send and receive email. My concern is down time. We would like as little down time as possible.
Our exchange 2010 server has the SSL Certificate. Do I move the certificate to the new server, migrate all mailboxes and swap IP addresses on the servers?
Of do I get a new certificate for the Exchange 2013 server, migrate mailboxes, setup another mx record and add entries with Registrar and firewall?
Thank you for the assistance.