For the last few years now I’ve been pushing best practice of using Fully Qualified Domain Names (FQDN) in configuration files and not using IP addresses. There is a reason for that and the reason is to make such situations easier. If your IT team requires a change in FQDN names, as long as you do not change the IP address and do not change the server names, the information below will help you.
Example: servernameX.domaina.com changes to servernameX.domainb.com
If there is a domain name changed required, the steps below are simple areas that you will need to update.