[Samba] Running smbd 4 + nmbd 3?

[Lou]

On Thu, Mar 11, 2021 at 10:41:12PM +0000, Rowland penny via samba wrote:
>Bite the bullet, classicupgrade to AD. 😁

classicupgrade seems great!  Although I've looked for some migration guides, how
didn't I find classicupgrade before? :-)

>An NT4-style domain is yesterdays technology, AD is the way forward. 
>If you must keep your domain running whilst you test the upgrade path, 
>then use Samba 4 and run smbd, nmbd and winbind on the PDC etc.

Let me first understand this.  It seems that, with NT4, I cannot have two PDCs
running on the network.  AD supports this, but I was wondering if I can have
both old PDC and new one running at the same time for the migration.  Is it
possible?

Thank you again.