Due to the nature of the product and its component solutions, renaming of the Symantec Management Platform (SMP) Server, including changing the domain it is a part of, is not recommend by Symantec Support nor fully supported. Only limited testing around this scenario has been conducted.
Make full backups of the SMP and its database prior to beginning. It is likely that a full restoration of the SMP and its database (to the original domain) will likely be necessary if something goes wrong.
The best way to change the SMP server name or domain would be: