I need to upgrade a Windows 2012 Domain Controller to Windows 2019 but need to keep the same IP Address. Which of these two paths is better?
Add an additional DC with Windows 2019 and transfer FSMO Roles to it. Demote Windows 2012 DC. Install another 2019 DC with the same IP address as the old Windows 2012 one and finally transfer the FSMO roles to it.
Install a new Windows 2019 DC, transfer FSMO roles to it. Demote Windows 2012 DC and then change the IP address of the new Windows 2019 DC?