Devices that were added to the maps by name will be set (by default) to resolve name to update IP. As long as the DNS server we’re using is updated with the new IPs they should change automatically.
Please verify the settings for DNS in Edit > Server Settings > DNS/WINS Settings.
If the devices were added by IP, a file export > edit > file import cycle will be required.
If that isn’t known, it can be checked using a data file export which includes the Resolve field from the Devices table.