integrated Samba to respond under different FQDN - how?

[lejeczek]

Hi guys.

I'd like to ask whether Samba should be able to respond 
under/via a FQDN different from IPA's default.

I use word "should" deliberately as I have Samba do that, with:
- ipa-server-4.8.7-14.module_el8.3.0+698+d6d67052.x86_64
- samba-4.13.4-1.el8.x86_64
Eg. IPA is: "priv.my.dom.private" and its DNS manages 
"us.private" and Samba is completely fine serving Win10 
non-enrolled clients under "us.private".
I did not do any "extra" tweaking, certainly I do not 
recall, only usual DNS bits.

Now I'm hoping to have the same with:
- ipa-server-4.9.0-1.module_el8.4.0+639+a88aab78.x86_64
- samba-4.13.4-1.el8.x86_64
but having, I believe virtually the same setup, Samba is not 
happy.
n
Before I paste any logs, etc. - I guess the question for an 
expert, if one happens to read this is - should it work in 
as well or that functionality was "taken away" in 4.9.

many thanks, L