Windows Active Directory (domain environment first)

Windows domain environment enables unified management of computers within a domain environment, including centralized authentication and unified activity behavior

A DC (domain controller) to exist in a domain environment

A server with AD (Active Directory) installed becomes a DC.

When you install a DC, you need to configure the DNS server to point to the server for all DNS servers, and if the DNS service is deployed on a DC at the same time, it needs to point its own DNS to itself (to use the IP address do not use the local loopback address 127.0.0.1).

Group Policy folder: SYSVOL

After you point the domain controller's DNS to itself, the SRV record is incomplete to restart the Netlogon service on the domain controller: net stop netlogon

Net start Netlogon

Windows Active Directory (domain environment first)