Service Connection Point Configuration Exchange 2013

Before we get to the SCP, do you change DNS entries from the internet before we do SCP?

After all this is done the last step would be to move the mailboxes?

I'm at the point of configuring my SCP and I ran a script to see what each autodiscoverserviceinternalURI is.
                              On Exchange 2010 its using the outside URL that I connect to for other services such as https://mail.domain.com/autodiscover/autodiscover.xml
                              On Exchange 2013 its using an INTERNAL URL: https://server.domain.local/autodiscover/autodiscover.xml

Should the URI be for both servers

Name                           : Exchange 2010 (Current Setting)
AutoDiscoverServiceInternalUri : https://mail.domain.com/autodiscover/autodiscover.xml

Name                           : Exchange 2013
AutoDiscoverServiceInternalUri : https://mail.domain.com/Autodiscover/Autodiscover.xml