Hello,
To update root hints on a Windows Server DNS server that is configured as a domain controller:
- Click Start, point to Administrative Tools, and then click DNS.
- In the right pane, right-click ServerName, where ServerName is the name of the server, and then click Properties.
- Click the Root Hints tab.
- Do one of the following:
- Add a root server to the list. To do so, click Add, specify the FQDN and the IP address of the root server that you want to add, and then click OK.
- Copy the root hints from another DNS server. To do so, click Copy from Server, specify the IP address of the DNS server where you want to copy the root hints from, and then click OK.
- Click OK.
You can refer to the following link:
Troubleshoot DNS name resolution on the Internet - Windows Server | Microsoft Learn
After configuring root hints, your DNS server should be able to resolve external names and IPs. If the issue persists, you may need to check your firewall settings to ensure that DNS traffic is allowed to pass through.
Best regards
Zunhui