Hi ,
Based on my research,it seems that this issue is DNS submits 2 different LDAP modification requests, one for A records, one for AAAA records, one immediately after the other. Since both requests modify the same AD object (RootDNSServers) the last one wins (AAAA), and A records are overwritten in the AD zone.
It is rare that IPv6 addresses need to be added to root hints. Root hint lookup should be sufficient with IPv4 addresses alone. If not absolutely required, do not add IPv6 address to root hints that already have valid IPv4 addresses.
As a workaround, you can copy them from a working DNS server.
If you have a working DNS server on your domain:
Go to domain >>right click properties >>root hints >>copy from server and select a server from your domain
If you don't have a working DNS server on the domain:
Go to domain >>right click properties >>root hints >>copy from server >>select ONE OF THE ROOT HINTS SERVER from the following list
( make sure the server is reachable via ping )
https://www.iana.org/domains/root/servers
Hope this can help you.
--Please Accept as answer if the reply is helpful--
Best Regards,
Candy