I am using Exchange server 2007 i have valid Third party CA(DigiCert) it is going to expire soon.
I have a plan to upgrade my exchange to Exchange 2013.
I have my digicert certificate for 3 SAN names mail.mydomain.com, autodiscover.mydomain.com, mydomain.com
do i need anymore SAN names like legacy.mydomain.com as i will be upgrading to exchange 2013 soon.
Please do guide me.