Moderator: Thread moved to the vCenter Server area, since your question is specific to VCSA.
in 7.0 the system name used during setup is still used as the PNID which causes and issue if you change the IP address (but not the PNID) later.
However, in 7.0 you can also change the PNID now. So you can do the following:
- Change the PNID to an FQDN (see Reconfigure the Primary Network Identifier )
- Change the IP address (see Configure the DNS, IP Address, and Proxy Settings )