Just a quick post today. We have migrated our Symantec Endpoint Protection Manager to a new server last week. For the most part the Disaster recovery best practices support article is very useful. However what it doesn’t mention is that unless your new server has the same name your clients will still be trying to connect to the old one. I suppose that’s why it is a DR procedure rather than a migration.
What you need to do is update the clients connection settings. There are a few ways in which you can achieve this again pretty well detailed here and for SEP 12.1 RU2 or newer here.