How to create a DKIM record to DNS?

Your Guide to Safe Emails: Create and Implement a DKIM Record

https://mailtrap.io/blog/create-dkim-tutorial/

Step-By-Step : How to install and configure Domain Controller on Windows Server 2019

https://www.virtualgyanis.com/post/step-by-step-how-to-install-and-configure-domain-controller-on-windows-server-2019

Only see a part of the computers, servers and other network resources in a network

Only see a part of the computers, servers and other network resources in a domain?

Solution:

DNS server manager, under DNS, right-click the server name, choose 'Set aging/scavenging for all zones...'.
Tick 'Scavenge stale resource records'.
Right-click 'Reverse Lookup Zones', choose 'Set aging/scavenging for all zones...'.
Tick 'Scavenge stale resource records'.

Can open some websites, but can not open some other websites

One of the Bell DNS servers have problems.

On our DNS server, choose e.g. NTS3850SERVER / Forwarders, right-click on Forwarders, then choose Properties. On the Forwarders tab, add another Bell DNS server IP address (a working one), and 'Up' it to the top, then we can open any website now.

Finding DNS information of a domain

http://www.robtex.com/whois/