I am afraid it is not really stable when joining as DC but I tried some time ago.
It should be possible to take the FSMO roles but not via UI and I never tried:
https://wiki.samba.org/index.php/Transferring_and_Seizing_FSMO_Roles
I am afraid it is not really stable when joining as DC but I tried some time ago.
It should be possible to take the FSMO roles but not via UI and I never tried:
https://wiki.samba.org/index.php/Transferring_and_Seizing_FSMO_Roles