- Log in to the domain controller using administrative credentials.
- Open the Active Directory Users and Computers tool.
- In the navigation pane, choose the group to which you want to add the user.
- Right-click the group and select Properties.
- In the group’s properties window, select the Members tab.
- Click the Add button.
- Select the users you’d like to add, then OK.
- Click the Apply button to confirm your changes, then OK to close the window.