When installing the solutions via SIM in a new server, using the old DB, you are asked for the FQDN and the URL for the console.
If you choose to change the FQDN, make sure to send a script changing the agents' Notification Server using AeXAgentUtil.exe /Server: https://support.symantec.com/en_US/article.HOWTO5511.html.
Best scenario when changing the FQDN is to maintain a new and an old console (two different dbs) at the same time, and after redirecting the agents, you can dispose of the old NS.
If you choose to maintain the same FQDN, there are no further steps.
Also, don't forget to have your KMS keys https://support.symantec.com/en_US/article.HOWTO93182.html.