You can't directly change the "Administrator" account name in Windows Server 2016. However, you can rename the account by creating a new administrator account with a different name and then disabling the built-in "Administrator" account.
Here's how to do it:
1. Create a New Administrator Account
- Open Server Manager.
- Navigate to Tools > Local Users and Groups.
- Right-click on Users and select New User.
- Enter a User name and Password for the new administrator account.
- Check the Administrator box to grant administrator privileges.
- Click Create.
2. Disable the Built-in "Administrator" Account
- In Local Users and Groups, navigate to Users.
- Right-click on the Administrator account and select Properties.
- Go to the Account tab.
- Under Account options, check the Account is disabled box.
- Click Apply and then OK.
Now you have a new administrator account with your desired name, and the original "Administrator" account is disabled.
3. Log in with the New Administrator Account
- Restart your server.
- Log in using the new administrator account you created.
Note: This process will not change the name of the built-in "Administrator" account, but it will disable it and allow you to use your new account with full administrative privileges.