To convert a Windows server to a domain controller, there are two main steps that need to be taken. The first step is to install the Active Directory Domain Services role on the server. This can be done using the Server Manager tool in Windows Server. Once the role is installed, the server will need to be configured as a domain controller. This involves running the dcpromo.exe command, which launches the Active Directory Domain Services Installation Wizard.
During the installation wizard, the administrator will need to specify the domain name and the domain controller options, such as the DNS server and Global Catalog options. The wizard will also prompt the administrator to provide the necessary credentials for the new domain controller. Once the installation is complete, the server will need to be restarted, and the administrator will need to verify that the new domain controller is functioning correctly.
It is important to note that converting a Windows server to a domain controller should be done with caution, as it is a critical role in an organization's IT infrastructure. Additionally, it is important to ensure that the server meets the necessary hardware and software requirements for running as a domain controller, as well as ensuring that the existing network infrastructure is properly configured to support the new domain controller.