[Samba] Need help setting up Samba DC in Windows environment

[Owen DeLong]

I'm having difficulty constructing my first samba DC in a currently windows-only environment.
When I run:
samba-tool domain join <domain> DC -U “<workgroup>\owen.delong"
I get the authentication prompt, enter my password, then:
INFO 2023-05-08 15:28:07,002 pid:73304 /usr/lib/python3/dist-packages/samba/join.py #1488: workgroup is <workgroup>
INFO 2023-05-08 15:28:07,004 pid:73304 /usr/lib/python3/dist-packages/samba/join.py #1491: realm is <domain>
Adding CN=SJC-BR-01,OU=Domain Controllers,DC=<domain1>,DC=<domain2>
Adding CN=krbtgt_SJC-BR-01,CN=Users,DC=<domain1>,DC=<domain2>
Got krbtgt_name=krbtgt_14279
Renaming CN=krbtgt_SJC-BR-01,CN=Users,DC=<domain1>,DC=<domain2> to CN=krbtgt_14279,CN=Users,DC=<domain1>,DC=<domain2>
Adding CN=SJC-BR-01,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=<domain1>,DC=<domain2>
Join failed - cleaning up
Deleted CN=SJC-BR-01,OU=Domain Controllers,DC=<domain1>,DC=<domain2>
Deleted CN=krbtgt_14279,CN=Users,DC=<domain1>,DC=<domain2>
ERROR(ldb): uncaught exception - LDAP error 32 LDAP_NO_SUCH_OBJECT - CN=Sites,CN=Configuration,DC=<domain1>,DC=<domain2> <0000208D: NameErr: DSID-0310028C, problem 2001 (NO_OBJECT), data 0, best match of:
 'CN=Sites,CN=Configuration,DC=<domain1>,DC=<domain2>'
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I'm completely out of my depth when it comes to Active Directory. I'm a long-time linux/unix/juniper/cisco guy.
The intent is for this to be a local DC at a stub site (branch office).
This is on a dietpi system (arm64, nanopi r6s).
Linux sjc-br-01 5.10.110 #1 SMP Tue Mar 14 21:59:07 CST 2023 aarch64 GNU/Linux
Samba 4.13.13-Debian
(.deb package install)



Any assistance, pointers, references greatly appreciated.

Thanks,

Owen