[Samba] Removing a Domain Controller

[Brady, Mike]

I am in the process of upgrading my Centos 6/Samba 4.1 AD DCs to 
Centos7/Samba 4.2, but I see from a few discussions on the list that it 
is currently not possible to remove an AD DC using samba-tool because it 
does not delete all the FSMO roles.

Can Windows tools be used to remove the DCs properly?

The Samba Wiki page  
https://wiki.samba.org/index.php/Flexible_Single-Master_Operations_(FSMO)_roles#FSMO_role_management_using_the_Windows_GUI 
has a reference to using Windows tools to manage the FSMO roles, but the 
referenced page only says that are 5 roles.

Does following this procedure to move the roles actually transfer all 7 
roles?

Is there some other way to properly remove and AD DC using Windows 
tools?

Thanks

Mike