Do you have a domain name on your server and wish to change it? If so, then read on and find instructions below. However if you wish to change your domain name to a new web host or change the domain name on your current host, then you will need to contact your hosting company because those are changes you are unable to make on your own.
The changes need to be made on the registry of the computer, so you will have to have access to it. If you are operating a server from your computer at home or your office, then this is something you will be able to do when you want to change your domain names.
However, you should keep in mind that messing around in your registry can be tricky so make sure you know what you are doing before you change anything or you may make a mistake that leaves you unable to operate your computer at all.
Before you can change your domain name, you will have to break the trust connections which exist. You will have to remove it from both sides on the trust. Then terminate all of the back office services like Microsoft Exchange Server, Internet Information Server, and the SQL Server. Put all of these services on manual startup.
Now...