The first thing you should do after the domain is set up is to create a backup of the domain controller. If you can, you should create a secondary domain controller to act as a backup to the primary if it should become unavailable. Setting up a backup DC is similar to creating the first except you’ll be adding to an existing domain instead of creating a new one.
Adding clients to the domain – to add a client machine to the domain, you go to Start and right click on My Computer and then select Properties. Click on the Computer Name tab. In the domain field, enter the name of your domain (Figure 1). Click OK and you will be prompted to enter administrative credentials to join the domain. After the client contacts the domain controller, you will be prompted to reboot.
User Accounts can be managed using Active Directory Users and Computers and can be found under Start, Control Panel, Administrative Tools. User accounts and groups can be created here. Passwords can be easily reset by right-clicking on a user account and selecting Properties.
Group Policy can be managed by going under Start, Control Panel, Administrative Tool, Group Policy – be sure to read up on the details of setting up a group policy since it is possible to set a policy that locks you out of logging into your computers.
There is so much you could cover regarding domains. If you really are going to go through with setting up your own domain, you should read up on the topic.