change AD domain name

[Bruce Hammerich]

we are a healthcare organization and just merged with another practice.   Consequently we are changing our domain name which means I have to change our AD domain name.  I have a Windows Server 2016 DC and a Windows 2008 R2 DC.   If I change the name on the Windows Server 2016 will it replicate to the Windows 2008 DC or will I have to manually change that one as well?  Any help would be greatly appreciated

Bruce

[#2]

Domain rename would affect all domain controllers.

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc738208(v=ws....

 Domain controller rename affects only one instance.

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc...