samba - Apr 2023 - Unable to "rejoin" existing DC after upgrade (infamous WERR_FILE_NOT_FOUND)

Apologies. Now I get it. Only one SRV record for the PCD emulator. I will delete
the other 2.

If I transfer the FSMO role will that be updated then ?

The other FSMO roles,??also have / need DNS entries unique to only the machine
that has the role ?

LP
On 14 Apr 2023 at 15:13 +0200, Rowland Penny via samba <samba at
lists.samba.org>, wrote:
>
> Which clearly shows you have three records for the PDC_Emulator DC and
> like that FSMO role, there can only be one, the DC that holds the role,
> you should delete the two incorrect ones.
>
>

On 14/04/2023 14:20, Luis Peromarta via samba wrote:
> Apologies. Now I get it. Only one SRV record for the PCD emulator. I will
delete the other 2.
Yes, one PDC_Emulator, one dns record.
> 
> If I transfer the FSMO role will that be updated then ?
On a samba AD DC, the samba_dnsupdate script is run at start up and then 
every 10 minutes, this script uses a file called dns_update_list and if 
a required dns record is missing, it is created. One of these records is 
this:

# The PDC emulator
${IF_PDC}SRV        _ldap._tcp.pdc._msdcs.${DNSDOMAIN}  ${HOSTNAME} 389

If you move the PDC emulator role to another DC, the required SRV record 
will be created, but there is no code to delete the old record.
> 
> The other FSMO roles,??also have / need DNS entries unique to only the
machine that has the role ?
No, it is just the PDC emulator role, because there can only be one.

Rowland