I had to upgrade some old CentOS 6 servers with even older SaMBa NT4 DC on it. I went to CentOS 8.
Since AD DC functionality is not included in the C8 rpms, I recompiled the SaMBa rpm packages from Rawhide. All went smooth. I did the upgrade and after some trial/error/google cases (it was my first time with this type of migration) the status is “it works fine for me”.
If anyone needs them, the packages can be found in the Frank repo.