We are migrating from 2010 to 2013. The network domain is localdomain.org but we use a seperate domain for email called emaildomain.org.
Got a new cert with: mail.emaildomain.com, autodiscover.emaildomain.com, ex2010.emaildomain.com, ex2010.emaildomain.com
installed cert on EX2010 and exported and imported on Ex2013
Migrated a mailbox to Ex2013
Setup Outlook 2016 internally with a new profile and connected ok - no cert errors.
After opening outlook and loading the profile, it then pops up with a cert error that the name doesn't match the certificate. The name on the cert shows all the SAN names above but says it is coming from ex2013.localdomain.com (not emaildomain.com). I can ignore the error and it goes away and everything is working still.
Internal and external autodiscover is set to mail.emaildomain.com
Do I need the local domain name in the cert as well maybe ?
Also, until the migration is complete should the autodiscover for Ex2010 remain what it was or change it to match the Ex2013?
Just don't want to make a change and hundreds of people can't connect or get cert errors.
Also, in DNS should the IP of mail.emaildomain.org point to the 2010 server or new 2013 server? We are doing split DNS.
Thanks!