How do I change the FQDN of the Desktop Central Server?

How do I change the FQDN of the Desktop Central Server?

I just migrated my Desktop Central Server over to a new server that I will will be moving over to our DMZ. Game plan is to end up patching machines that are not on our network using a Public IP. Anyways, when I migrated my server using the migration utility I forgot to use the FQDN that I had set up on our network and I used the server name by accident. Now that everything is migrated over to the new server I cannot figure out how to make the agents contact the DC server using a FQDN rather than the server name. How do I change the FQDN of the DC server within the console?

Can anyone tell me how to do this?